Add markdownlint autofix and pre-commit hooks

[gundalow]

Summary

This PR adds comprehensive markdown linting with autofix capabilities and pre-commit hooks to ensure code quality. All markdown files have been cleaned up and formatted according to the project's linting rules.

Changes

Markdown Fixes

• Fixed all MD013 line-length errors (29 lines across 8 files)
• Fixed MD036 emphasis-as-heading errors in command files
• Fixed MD060 table formatting errors in cop-review and zen skill
• All committed files now pass markdownlint validation

Pre-commit Infrastructure

• Added .pre-commit-config.yaml with hooks for:
  • Markdown linting (markdownlint-cli2)
  • YAML linting (yamllint)
  • Shell script checking (shellcheck)
  • JSON validation
  • File formatting (trailing whitespace, EOF, line endings)
• Added .markdownlint-cli2.yaml configuration
• Added .gitignore for node_modules and package-lock.json

Documentation

• Updated CONTRIBUTING.md with linting and pre-commit instructions
• Added development section with usage examples

GitHub Actions Sync

• Fixed YAML syntax in workflow files
• Pre-commit hooks use identical rules to GitHub Actions
• Ensures consistency between local development and CI

Files Changed

• 15 files changed
• 260 insertions(+), 99 deletions(-)
• All markdown files auto-fixed and manually reviewed
• All pre-commit hooks passing

Testing

Pre-commit hooks verified to pass:

✅ Lint Markdown files........Passed
✅ Lint YAML files............Passed
✅ Validate JSON files........Passed
✅ Fix end of files...........Passed
✅ Trim trailing whitespace...Passed
✅ Fix mixed line endings.....Passed

Usage

After merging, contributors should:

pip install pre-commit
pre-commit install

Hooks will automatically run on every commit to ensure code quality.

🤖 Generated with Claude Code