feat: implement OpenAI-compatible Realtime API with authentication and management features

- Added support for public Realtime API, including new routes for managing API keys and handling WebRTC connections.
- Introduced RealtimeApiKey model and associated CRUD operations for admin management of API keys.
- Implemented authentication mechanisms for API keys and client secrets.
- Enhanced environment configuration with new secrets for Realtime API.
- Created OpenAIRealtime session management and event processing for real-time interactions.
- Updated schemas and settings to accommodate new features and ensure compatibility with existing systems.

docs-developer/docs.json

@@ -46,7 +46,7 @@
     "groups": [
       {
         "group": "开始与对接",
-        "pages": ["index", "integrations"]
+        "pages": ["index", "integrations", "realtime-protocol"]
       }
     ]
   }