test: introduce `test-vitest-setup` project to handle test setup for vite tests

[BioPhoton]

Introduce test-vitest-setup project to handle test setup for vite tests

• Introduce test-vitest-setup and add configuration
  • adjust coverage.reportDirectory to be at project root (packages/<name>/.coverage)
• Extend vitest.{targetName}.config.ts from test-vitest-setup configuration
  • unit tests
  • int tests
  • e2e tests
• Rename nx-plugin/mock to models/mocks and adjust inputs
• Move zod2md.ts under {projectRoot}/tools and make sure "!{projectRoot}/tools/**/*" is added under nx.json#namedInputs.production

Example implementation:

• config
• usage