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

app/dtos/reading.py

@@ -0,0 +1,17 @@
+import random
+from typing import List, Optional
+
+from pydantic import BaseModel, Field
+
+from app.configs.constants import ReadingExerciseType, EducationalContent
+
+class ReadingExercise(BaseModel):
+    type: ReadingExerciseType
+    quantity: int
+    num_random_words: Optional[int] = Field(1)
+    max_words: Optional[int] = Field(3)
+
+class ReadingDTO(BaseModel):
+    text: str = Field(...)
+    exercises: List[ReadingExercise] = Field(...)
+    difficulty: str = Field(random.choice(EducationalContent.DIFFICULTIES))