add banbanmini backend

talkingq-url/services/registry.py

@@ -0,0 +1,17 @@
+from typing import Dict, Any
+
+SERVICE_REGISTRY: Dict[str, Dict[str, Any]] = {}
+
+
+def register_service(service_type: str, provider_name: str, implementation: Any):
+    SERVICE_REGISTRY.setdefault(service_type, {})[provider_name] = implementation
+
+
+def get_service(service_type: str, provider_name: str):
+    provider_dict = SERVICE_REGISTRY.get(service_type, {})
+    service_class = provider_dict.get(provider_name)
+    if service_class is None:
+        raise ValueError(
+            f"未找到服务类型 '{service_type}' 和提供商 '{provider_name}' 对应的实现。"
+        )
+    return service_class