Adds a new command `gt rig info <name>` that displays comprehensive information about a rig including: - Rig path and git URL - Active polecats with their state and assigned issues - Crew workers - Refinery status (state, PID, current MR, stats) - Witness and Mayor status with last activity times - Beads summary (open/in_progress/closed/blocked counts) Closes: gt-zko 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>