hivectl has verbs scattered across CLAUDE.md and domain docs (gateway.md
has the gateway subcommands, matrix.md has a brief mention) but no
single cheatsheet. Add docs/tools/hivectl.md covering all subcommands:
- forge create-user: provision/refresh agent or human forge accounts
- matrix create-user / sync-admin / promote-user / reset-password
- gateway create-user / delete-user / list-users (htpasswd management)
- agents restart / restart-all (container lifecycle via admin socket)
- choom <name> [--fresh]: interactive claude session in agent container
Also add a reading-path entry to CLAUDE.md pointing at the new file.
