feat: backend servis iskeletini ve yönetim uçlarını ekle

backend/app/tools/base.py

@@ -0,0 +1,12 @@
+from abc import ABC, abstractmethod
+from typing import Any
+
+
+class Tool(ABC):
+    name: str
+    description: str
+
+    @abstractmethod
+    async def run(self, payload: dict[str, Any]) -> dict[str, Any]:
+        raise NotImplementedError
+