feat: share changelog-mr skill

Koushik Kumaranrequested to merge
share-changelog-mr-skill into main

Summary

  • Commit the changelog-mr Claude Code skill (previously only local, since .claude/ was fully gitignored)
  • Carve out a .gitignore exception for .claude/skills/
  • Document the skill as a second option in the release docs (docs/source/contribute/release.md) instead of Manual CI Job.
  • Remove the CI job

🤖 Generated with Claude Code

Edited by Koushik Kumaran

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