Remove temporary refactoring documentation files

[Ukonhattu]

• Delete REFACTORING_SUMMARY.md (refactoring notes)
• Delete IMPLEMENTATION_COMPLETE.md (implementation checklist)
• Keep standard project documentation (README, CONTRIBUTING, test/README)

Description

Type of Change

• 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
• Code refactoring
• Performance improvement
• Test coverage improvement

Related Issues

Fixes #

Changes Made

• Change 1
• Change 2
• Change 3

Testing

Test Configuration

• OS: [e.g. Ubuntu 22.04]
• Vim/Neovim version: [e.g. Neovim 0.9.0]

Test Coverage

• Added unit tests for new functionality
• Added integration tests
• All existing tests pass
• Tested manually in Vim
• Tested manually in Neovim

Test Commands Run

# List the test commands you ran
vim -Nu NONE -c "Vader! test/**/*.vader"
vint autoload/ plugin/

Documentation

• Updated README.md (if needed)
• Updated doc/tmc.txt (if needed)
• Updated CONTRIBUTING.md (if needed)
• Added/updated code comments

Code Quality

• My code follows the project's code style guidelines
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings or errors
• Linter passes without errors (vint autoload/ plugin/)

Breaking Changes

N/A or:

• Breaking change 1: How to migrate
• Breaking change 2: How to migrate

Screenshots/Demos

Checklist

• I have read the CONTRIBUTING.md document
• My code follows the code style of this project
• I have added tests that prove my fix is effective or that my feature works
• All new and existing tests pass
• I have updated the documentation accordingly
• I have checked my code and corrected any misspellings

Additional Notes