create interface uow update services to uow

src/core/interfaces.py

@@ -0,0 +1,16 @@
+from typing import Protocol
+
+from src.repository.users import UsersRepo
+
+
+class IUnitOfWork(Protocol):
+    user: UsersRepo
+
+    async def __aenter__(self) -> "IUnitOfWork":
+        ...
+
+    async def __aexit__(self, exc_type, exc_val, exc_tb) -> None:
+        ...
+
+    async def commit(self) -> None:
+        ...