feat: category apis

src/query/book.rs

@@ -0,0 +1,4 @@
+// use crate::model::db::prelude::Book;
+// pub fn get_book_by_id(id:i64, uid:i64)->Option<Book> {
+// 
+// }

src/query/mod.rs

@@ -0,0 +1 @@
+mod book;