feat: Update endpoint books

endpoints/books.get.py

@@ -0,0 +1,32 @@
+from fastapi import APIRouter, Depends, HTTPException
+from core.database import fake_users_db
+from typing import List, Dict
+
+router = APIRouter()
+
+@router.get("/books")
+async def get_all_books():
+    """Get all available books"""
+    books_db = {
+        "1": {
+            "id": "1",
+            "title": "Sample Book 1",
+            "author": "Author 1",
+            "published_year": 2023
+        },
+        "2": {
+            "id": "2",
+            "title": "Sample Book 2",
+            "author": "Author 2",
+            "published_year": 2022
+        }
+    }
+    
+    return {
+        "message": "Books retrieved successfully",
+        "data": list(books_db.values()),
+        "metadata": {
+            "total_count": len(books_db),
+            "source": "demo_db"
+        }
+    }