Add /help and /status commands

- /help: Shows available commands and skills with descriptions
- /status: Quick dashboard overview across all domains
  - System health (disk, memory, updates)
  - Kubernetes status (nodes, pods, alerts)
  - Email summary (unread, urgent)
  - Calendar (today's events, next meeting)

Both commands added to component-registry.json with aliases:
- /help: /commands, /skills
- /status: /overview, /dashboard

Updated commands/README.md with new entries.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

state/component-registry.json

@@ -129,6 +129,16 @@
       "description": "Diagnose Kubernetes issues",
       "aliases": [],
       "invokes": "agent:k8s-diagnostician"
+    },
+    "/help": {
+      "description": "Show available commands and skills",
+      "aliases": ["/commands", "/skills"],
+      "invokes": "command:help"
+    },
+    "/status": {
+      "description": "Quick status overview across all domains",
+      "aliases": ["/overview", "/dashboard"],
+      "invokes": "command:status"
     }
   },
   "agents": {