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

app/controllers/abc/reading.py

@@ -1,10 +1,20 @@
 from abc import ABC, abstractmethod
-from typing import List
+from typing import Optional
+
+from fastapi import UploadFile
 
 
 class IReadingController(ABC):
 
     @abstractmethod
-    async def get_reading_passage(self, passage: int, topic: str, exercises: List[str], difficulty: str):
+    async def import_exam(self, exercises: UploadFile, solutions: UploadFile = None):
+        pass
+
+    @abstractmethod
+    async def generate_reading_passage(self, passage: int, topic: Optional[str], word_count: Optional[int]):
+        pass
+
+    @abstractmethod
+    async def generate_reading_exercises(self, passage: int, dto):
         pass