Remove add/remove commands and document CLI improvement plan
- Remove monopam add and remove commands from CLI (use agent skills instead)
- Add comprehensive CLI improvement plan covering:
- Verse remotes: auto-managed during sync
- Opam metadata sync: local always trumps opam-repo
- Doctor command: Claude-powered analysis with JSON/text output
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>