Changes to endpoints so they allow to only get context and then the exercises as well as tidying up a bit

app/services/abc/exam/reading.py

@@ -1,20 +1,15 @@
 from abc import ABC, abstractmethod
-from queue import Queue
-from typing import List
+from fastapi import UploadFile
 
 
 class IReadingService(ABC):
 
     @abstractmethod
-    async def gen_reading_passage(
-            self,
-            passage_id: int,
-            topic: str,
-            req_exercises: List[str],
-            number_of_exercises_q: Queue,
-            difficulty: str,
-            start_id: int
-    ):
+    async def import_exam(self, exercises: UploadFile, solutions: UploadFile = None):
+        pass
+
+    @abstractmethod
+    async def generate_reading_exercises(self, dto):
         pass
 
     @abstractmethod