Add user management routes

Integrate the new user management routes into the main application
router. This commit also includes refactoring of the OpenSubsonic
response types to better accommodate error responses and introduces a
new struct for handling multiple extensions.

src/main.rs

@@ -9,6 +9,7 @@ use axum::Router;
 use dotenvy::dotenv;
 
 use crate::routes::system_router::system_routers;
+use crate::routes::user_management_router::user_management_routs;
 use crate::state::AppState;
 
 #[tokio::main]
@@ -19,7 +20,7 @@ async fn main() {
         .unwrap_or_else(|_| panic!("Error creating pool for {}", database_url));
     tracing_subscriber::fmt::init();
     let app = Router::new()
-        .nest("/rest", system_routers())
+        .nest("/rest", system_routers().merge(user_management_routs()))
         .with_state(state);
 
     let listener = tokio::net::TcpListener::bind("0.0.0.0:3311").await.unwrap();