Fixed more or less reading import, attempted to do listening

app/controllers/abc/listening.py

@@ -1,9 +1,14 @@
 from abc import ABC, abstractmethod
-from typing import List
+
+from fastapi import UploadFile
 
 
 class IListeningController(ABC):
 
+    @abstractmethod
+    async def import_exam(self, exercises: UploadFile, solutions: UploadFile = None):
+        pass
+
     @abstractmethod
     async def generate_listening_dialog(self, section_id: int, topic: str, difficulty: str):
         pass