feat: add QQ Bot platform adapter (Official API v2)

Add full QQ Bot integration via the Official QQ Bot API (v2):
- WebSocket gateway for inbound events (C2C, group, guild, DM)
- REST API for outbound text/markdown/media messages
- Voice transcription (Tencent ASR + configurable STT provider)
- Attachment processing (images, voice, files)
- User authorization (allowlist + allow-all + DM pairing)

Integration points:
- gateway: Platform.QQ enum, adapter factory, allowlist maps
- CLI: setup wizard, gateway config, status display, tools config
- tools: send_message cross-platform routing, toolsets
- cron: delivery platform support
- docs: QQ Bot setup guide

hermes_cli/tools_config.py

@@ -426,6 +426,8 @@ def _get_enabled_platforms() -> List[str]:
         enabled.append("slack")
     if get_env_value("WHATSAPP_ENABLED"):
         enabled.append("whatsapp")
+    if get_env_value("QQ_APP_ID"):
+        enabled.append("qq")
     return enabled