feat: tag api

src/model/http_body/mod.rs

@@ -1,3 +1,4 @@
 pub mod book;
 pub mod common;
-pub mod category;
+pub mod category;
+pub mod tag;

src/model/http_body/tag.rs

@@ -0,0 +1,14 @@
+use serde::{Serialize, Deserialize};
+use super::common::{number_stringify, OptionalI64};
+
+#[derive(Serialize)]
+pub struct TagItem {
+    #[serde(with="number_stringify")]
+    pub id: OptionalI64,
+    pub name: String,
+}
+
+#[derive(Serialize,Deserialize)]
+pub struct TagInfo {
+    pub name: String,
+}