Implements bd-jx90: simple cleanup command without API key requirement.
Features:
- Delete all closed issues with --force
- Filter by age with --older-than N (days)
- Preview with --dry-run
- Cascade deletion with --cascade
- JSON output support
Usage:
bd cleanup --force # Delete all closed
bd cleanup --older-than 30 --force # Delete >30 days old
bd cleanup --dry-run # Preview
Closes bd-jx90
Amp-Thread-ID: https://ampcode.com/threads/T-8d905db0-4ec7-411e-95de-1f044219dc9c
Co-authored-by: Amp <amp@ampcode.com>
