- Add PR template with description, type of change, and contributing checklist
- Enforce target branch: label + comment + 24h auto-close for PRs targeting main
- Flag bad issue titles: label + comment + 24h auto-close instead of instant close
- Redirect feature requests to Discussions (instant close, unchanged)
- Add two scheduled workflows to close stale labeled issues and PRs after 24h
- Update CONTRIBUTING.md with tests and branch up-to-date requirements
