chore: documentation updates and quick fixes

- Add missing command docs to SKILL.md (delegate, logs, status, doctor, notify, server, queue)
- Add KUGETSU_VERBOSITY to config options table
- Delete outdated test-kugetsu.sh (tests non-existent resume/stop commands)
- Fix Phase 3 status in kugetsu-architecture.md (was In Progress, now Implemented)
- Fix env rm quote handling (use grep -v instead of sed)
- Add error handling for opencode init command

docs/kugetsu-architecture.md

@@ -326,7 +326,7 @@ When a Coding Agent starts, it:
 | Phase 1 | ✅ Complete | SSH + Tailscale remote access |
 | Phase 1b | ✅ Complete | Tailscale VPN setup |
 | Phase 2 | 📋 Planned | API Interface |
-| Phase 3 | 🔄 In Progress | Chat Integration (Telegram) |
+| Phase 3 | ✅ Implemented | Chat Integration (Telegram) |
 | Phase 4 | 📋 Planned | Web Dashboard |
 
 ### 6.2 Current Implementation