* Add markdownlint analysis for local dev and CI
- Add .markdownlint.jsonc with rule configuration
- Add .markdownlint-cli2.jsonc with ignore patterns
- Add package.json with markdownlint-cli2 and lint scripts
- Add GitHub Actions workflow running on PRs touching *.md files
- Add VS Code extension recommendation for vscode-markdownlint
* Apply suggestions from code review
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
* Address review comments: use markdownlint-cli2-action, merge configs, lint only changed files
- Replace manual Node.js + npm setup with DavidAnson/markdownlint-cli2-action (pinned to SHA)
- Use tj-actions/changed-files to lint only PR-changed markdown files
- Merge .markdownlint.jsonc into .markdownlint-cli2.jsonc (single config file)
- Remove package.json and package-lock.json (no longer needed)
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Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>