feat: add comprehensive contributing documentation and governance

.github/CODEOWNERS.example

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+# CODEOWNERS.example
+# 
+# This is a template for the CODEOWNERS file that defines code ownership for the UI Kit repository.
+# To activate this file, rename it to "CODEOWNERS" and create the GitHub teams referenced below.
+# 
+# Code owners are automatically requested for review when someone opens a pull request that modifies code that they own.
+# 
+# More info: https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners
+#
+# NOTE: The GitHub teams referenced in this file (@ui-kit-maintainers, @devops-team, etc.) 
+# need to be created in the GitHub organization before this file can be activated.
+
+# Global Owners
+# These users are the default owners for everything in the repo unless a later match takes precedence.
+* @ui-kit-maintainers
+
+# Root Configuration Files
+# Critical configuration files that affect the entire project
+/.github/ @ui-kit-maintainers @devops-team
+/package.json @ui-kit-maintainers
+/pnpm-lock.yaml @ui-kit-maintainers
+/pnpm-workspace.yaml @ui-kit-maintainers
+/tsconfig*.json @ui-kit-maintainers
+/vite.config.ts @ui-kit-maintainers
+/.eslintrc.cjs @ui-kit-maintainers
+/.prettierrc @ui-kit-maintainers
+/tailwind.config.js @ui-kit-maintainers
+
+# DevContainer and Docker
+/.devcontainer/ @devops-team
+/Dockerfile* @devops-team
+/docker-compose*.yml @devops-team
+
+# CI/CD and Automation
+/.github/workflows/ @devops-team @ui-kit-maintainers
+/.github/actions/ @devops-team
+/.changeset/ @ui-kit-maintainers
+/scripts/ @devops-team @ui-kit-maintainers
+
+# Documentation
+/README.md @docs-team @ui-kit-maintainers
+/CONTRIBUTING.md @docs-team @ui-kit-maintainers
+/CHANGELOG.md @docs-team @ui-kit-maintainers
+/docs/ @docs-team
+/.github/pull_request_template.md @docs-team @ui-kit-maintainers
+/.github/CODEOWNERS @ui-kit-maintainers
+
+# UI Kit Package
+/packages/ui-kit/ @ui-kit-maintainers
+
+# Core Components
+/packages/ui-kit/src/components/primitives/ @component-team @ui-kit-maintainers
+/packages/ui-kit/src/components/layout/ @layout-team @ui-kit-maintainers
+/packages/ui-kit/src/components/form/ @form-team @ui-kit-maintainers
+
+# Providers and Context
+/packages/ui-kit/src/providers/ @architecture-team @ui-kit-maintainers
+
+# Utilities and Hooks
+/packages/ui-kit/src/utils/ @utils-team @ui-kit-maintainers
+/packages/ui-kit/src/hooks/ @hooks-team @ui-kit-maintainers
+
+# Styling and Theming
+/packages/ui-kit/src/styles/ @design-system-team @ui-kit-maintainers
+/packages/ui-kit/src/theme/ @design-system-team @ui-kit-maintainers
+/packages/ui-kit/src/tokens/ @design-system-team @ui-kit-maintainers
+
+# Testing Infrastructure
+/packages/ui-kit/src/**/*.test.* @testing-team @ui-kit-maintainers
+/packages/ui-kit/src/**/*.spec.* @testing-team @ui-kit-maintainers
+/packages/ui-kit/cypress/ @testing-team @ui-kit-maintainers
+/packages/ui-kit/playwright/ @testing-team @ui-kit-maintainers
+/packages/ui-kit/vitest.config.ts @testing-team @ui-kit-maintainers
+/packages/ui-kit/cypress.config.ts @testing-team @ui-kit-maintainers
+/packages/ui-kit/playwright.config.ts @testing-team @ui-kit-maintainers
+
+# Storybook
+/packages/ui-kit/.storybook/ @storybook-team @ui-kit-maintainers
+/packages/ui-kit/src/**/*.stories.* @storybook-team @component-team
+
+# Build and Bundle Configuration
+/packages/ui-kit/vite.config.ts @build-team @ui-kit-maintainers
+/packages/ui-kit/tsconfig*.json @build-team @ui-kit-maintainers
+/packages/ui-kit/package.json @ui-kit-maintainers
+
+# Security and Dependencies
+/packages/ui-kit/pnpm-lock.yaml @security-team @ui-kit-maintainers
+/.nvmrc @devops-team
+/.node-version @devops-team
+
+# Specific Component Ownership Examples
+# Uncomment and modify these as teams are assigned to specific components
+
+# /packages/ui-kit/src/components/primitives/Button/ @button-specialist
+# /packages/ui-kit/src/components/primitives/Input/ @form-specialist
+# /packages/ui-kit/src/components/layout/Grid/ @layout-specialist
+# /packages/ui-kit/src/components/form/DataTable/ @datatable-specialist
+
+# Performance and Bundle Size
+/packages/ui-kit/size-limit.config.js @performance-team @ui-kit-maintainers
+
+# Error Handling and Monitoring
+/packages/ui-kit/src/providers/ErrorBoundary/ @monitoring-team @ui-kit-maintainers
+/packages/ui-kit/src/utils/logger/ @monitoring-team @ui-kit-maintainers
+
+# Accessibility
+/packages/ui-kit/src/**/*a11y* @accessibility-team @ui-kit-maintainers
+/packages/ui-kit/src/**/*accessibility* @accessibility-team @ui-kit-maintainers
+
+# Team Definitions (GitHub teams that should be created)
+# 
+# @ui-kit-maintainers - Core maintainers with full repository access
+# @devops-team - DevOps and infrastructure specialists
+# @docs-team - Documentation specialists
+# @component-team - UI component specialists
+# @layout-team - Layout and responsive design specialists
+# @form-team - Form component specialists
+# @architecture-team - System architecture specialists
+# @utils-team - Utility function specialists
+# @hooks-team - React hooks specialists
+# @design-system-team - Design system and theming specialists
+# @testing-team - Testing infrastructure specialists
+# @storybook-team - Storybook and documentation specialists
+# @build-team - Build and bundling specialists
+# @security-team - Security and dependency management specialists
+# @performance-team - Performance and optimization specialists
+# @monitoring-team - Error handling and monitoring specialists
+# @accessibility-team - Accessibility specialists 

.github/pull_request_template.md

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+## Description
+
+### Summary
+
+<!-- Provide a brief summary of the changes in this PR -->
+
+### Motivation and Context
+
+<!-- Why is this change required? What problem does it solve? -->
+<!-- If it fixes an open issue, please link to the issue here -->
+
+### Type of Change
+
+<!-- Mark the relevant option with an "x" -->
+
+- [ ] 🐛 Bug fix (non-breaking change which fixes an issue)
+- [ ] ✨ New feature (non-breaking change which adds functionality)
+- [ ] 💥 Breaking change (fix or feature that would cause existing functionality to not work as expected)
+- [ ] 📚 Documentation update
+- [ ] 🔧 Refactoring (no functional changes, no api changes)
+- [ ] 🎨 Style changes (formatting, missing semi colons, etc; no code changes)
+- [ ] 🧪 Test changes (adding missing tests, refactoring tests; no production code changes)
+- [ ] 🔨 Build/CI changes (changes to build process or CI configuration)
+
+## Changes Made
+
+### Components/Features Added or Modified
+
+<!-- List the main components, features, or areas of code that were changed -->
+
+-
+-
+-
+
+### Files Changed
+
+<!-- List the key files that were modified (auto-generated by GitHub, but highlight important ones) -->
+
+-
+-
+-
+
+## Testing
+
+### Test Coverage
+
+<!-- Describe the tests you ran to verify your changes -->
+
+- [ ] Unit tests added/updated
+- [ ] Integration tests added/updated
+- [ ] Storybook stories added/updated
+- [ ] Accessibility tests pass
+- [ ] Visual regression tests pass
+- [ ] Manual testing completed
+
+### Test Instructions
+
+<!-- Provide instructions for reviewers to test your changes -->
+
+1.
+2.
+3.
+
+### Screenshots/Videos
+
+<!-- If applicable, add screenshots or videos to help explain your changes -->
+
+## Bundle Size Impact
+
+### Size Analysis
+
+<!-- Run `pnpm build && pnpm size-limit` and report results -->
+
+- [ ] Bundle size increase is within acceptable limits (< 10KB gzipped)
+- [ ] No bundle size increase
+- [ ] Bundle size decreased
+
+### Size Report
+
+```
+<!-- Paste the output of `pnpm size-limit` here -->
+```
+
+## Breaking Changes
+
+### API Changes
+
+<!-- List any breaking changes to the public API -->
+
+- [ ] No breaking changes
+- [ ] Breaking changes documented below
+
+### Migration Guide
+
+<!-- If there are breaking changes, provide a migration guide -->
+
+### Deprecation Notices
+
+<!-- List any deprecated features or APIs -->
+
+## Documentation
+
+### Documentation Updates
+
+- [ ] README updated (if needed)
+- [ ] CONTRIBUTING.md updated (if needed)
+- [ ] Storybook documentation updated
+- [ ] TypeScript types documented
+- [ ] Changelog entry added (via changeset)
+
+### Storybook
+
+- [ ] New stories added for new components
+- [ ] Existing stories updated for modified components
+- [ ] All stories render without errors
+- [ ] Interactive examples work correctly
+
+## Accessibility
+
+### A11y Compliance
+
+- [ ] Components are keyboard navigable
+- [ ] Proper ARIA labels and roles added
+- [ ] Color contrast meets WCAG standards
+- [ ] Screen reader testing completed
+- [ ] axe-core tests pass
+
+### A11y Testing Results
+
+<!-- Report any accessibility testing results -->
+
+## Code Quality
+
+### Code Review Checklist
+
+- [ ] Code follows project style guidelines
+- [ ] Self-review of code completed
+- [ ] Code is well-commented, particularly in hard-to-understand areas
+- [ ] No console.log statements left in production code
+- [ ] No TODO comments without associated issues
+- [ ] TypeScript types are properly defined
+- [ ] Error handling is appropriate
+
+### Linting and Formatting
+
+- [ ] ESLint passes without errors
+- [ ] Prettier formatting applied
+- [ ] TypeScript compilation successful
+- [ ] No new TypeScript errors introduced
+
+## Dependencies
+
+### Dependency Changes
+
+- [ ] No new dependencies added
+- [ ] New dependencies justified and documented
+- [ ] Dependencies updated to latest secure versions
+- [ ] No unused dependencies
+
+### Security
+
+- [ ] No security vulnerabilities introduced
+- [ ] Sensitive data properly handled
+- [ ] Input validation implemented where needed
+
+## Deployment
+
+### Environment Impact
+
+- [ ] Changes work in development environment
+- [ ] Changes work in production-like environment
+- [ ] No environment-specific configurations needed
+
+### Rollback Plan
+
+<!-- Describe how to rollback these changes if needed -->
+
+## Related Issues
+
+### Closes
+
+<!-- List any issues this PR closes -->
+
+- Closes #
+- Fixes #
+- Resolves #
+
+### Related
+
+<!-- List any related issues or PRs -->
+
+- Related to #
+- Depends on #
+- Blocks #
+
+## Reviewer Notes
+
+### Focus Areas
+
+<!-- Highlight specific areas where you want reviewer attention -->
+
+-
+-
+-
+
+### Questions for Reviewers
+
+<!-- Any specific questions or concerns for reviewers -->
+
+-
+-
+-
+
+### Additional Context
+
+<!-- Any additional context that would be helpful for reviewers -->
+
+---
+
+## Reviewer Checklist
+
+### Code Review
+
+- [ ] Code is readable and well-structured
+- [ ] Logic is sound and efficient
+- [ ] Error handling is appropriate
+- [ ] Security considerations addressed
+- [ ] Performance impact considered
+
+### Testing Review
+
+- [ ] Test coverage is adequate
+- [ ] Tests are meaningful and test the right things
+- [ ] Edge cases are covered
+- [ ] Tests pass consistently
+
+### Documentation Review
+
+- [ ] Documentation is accurate and complete
+- [ ] Examples are clear and helpful
+- [ ] API documentation is up to date
+
+### Design Review
+
+- [ ] UI/UX follows design system guidelines
+- [ ] Responsive design works correctly
+- [ ] Accessibility requirements met
+- [ ] Visual design is consistent
+
+### Final Approval
+
+- [ ] All automated checks pass
+- [ ] Manual testing completed
+- [ ] Ready for merge
+
+---
+
+**Note for Reviewers**: Please ensure all checklist items are completed before approving. If any items are not applicable, mark them as complete and note why in your review comments.