feat: add Codex CLI support, dual Discord bots, and Discord typing fix

- Add Codex as alternative agent type (agentType: 'codex' per group)
- Codex container runner with session resume and 100-turn limit
- Dual Discord bot support (DISCORD_BOT_TOKEN + DISCORD_CODEX_BOT_TOKEN)
- Each bot handles only its agentType's registered groups
- Discord typing indicator refreshes every 8s (was single-shot, expired after ~10s)
- Agent runner 100-turn limit to prevent infinite bot-to-bot loops
- Apple Container runtime support (convert-to-apple-container skill)
- Session commands (/compact) support
- DB migration for agent_type column

container/codex-runner/package.json

@@ -0,0 +1,16 @@
+{
+  "name": "nanoclaw-codex-runner",
+  "version": "1.0.0",
+  "type": "module",
+  "description": "Container-side Codex CLI runner for NanoClaw",
+  "main": "dist/index.js",
+  "scripts": {
+    "build": "tsc",
+    "start": "node dist/index.js"
+  },
+  "dependencies": {},
+  "devDependencies": {
+    "@types/node": "^22.10.7",
+    "typescript": "^5.7.3"
+  }
+}