impl tags api (#2)

src/api/mod.rs

@@ -0,0 +1,10 @@
+use serde::{Deserialize, Serialize};
+
+pub(crate) mod tag;
+
+#[derive(Debug, Deserialize, Serialize)]
+struct JsonResponse<T> {
+    code: u32,
+    err: String,
+    data: T,
+}