feat: Update endpoint library

endpoints/library.get.py

@@ -1,5 +1,4 @@
-# Entity: Book, Author
-```python
+
 from fastapi import APIRouter, Depends, HTTPException, status
 from sqlalchemy.orm import Session
 from typing import List
@@ -16,4 +15,3 @@ async def get_books_by_authors(
 ):
     books = db.query(Book).join(Author).all()
     return books
-```