create book dataclass

src/schemas/book.py

@@ -0,0 +1,12 @@
+from dataclasses import dataclass
+
+
+@dataclass
+class Book:
+    title: str | None = None
+    ppn: int | None = None
+    signature: str | None = None
+    isbn: str | None = None
+    link: str | None = None
+    database_id: int | None = None
+    link: str | None = None