Simplify verse commands: sync all registry members with opam repos
Changes:
- verse pull now clones/pulls ALL registry members unconditionally
- Each member gets both monorepo (verse/<handle>/) and opam repo
(verse/<handle>-opam/)
- Removed verse add and verse remove commands (no longer needed)
- verse sync is now just an alias for verse pull
The verse directory now contains:
verse/alice.bsky.social/ # monorepo
verse/alice.bsky.social-opam/ # opam overlay
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>