feat: initialize thoughts-frontend with Next.js, TypeScript, and ESLint

- Add ESLint configuration for Next.js and TypeScript support.
- Create Next.js configuration file with standalone output option.
- Initialize package.json with scripts for development, build, and linting.
- Set up PostCSS configuration for Tailwind CSS.
- Add SVG assets for UI components.
- Create TypeScript configuration for strict type checking and module resolution.

thoughts-backend/src/tokio.rs

@@ -0,0 +1,58 @@
+use api::{setup_config, setup_db, setup_router};
+use doc::ApiDoc;
+use utils::{create_dev_db, migrate};
+
+async fn worker(child_num: u32, db_url: &str, prefork: bool, listener: std::net::TcpListener) {
+    tracing::info!("Worker {} started", child_num);
+
+    let conn = setup_db(db_url, prefork).await;
+
+    if child_num == 0 {
+        migrate(&conn).await.expect("Migration failed!");
+    }
+
+    let router = setup_router(conn).attach_doc();
+
+    let listener = tokio::net::TcpListener::from_std(listener).expect("bind to port");
+    axum::serve(listener, router).await.expect("start server");
+}
+
+#[cfg(feature = "prefork")]
+fn run_prefork(db_url: &str, listener: std::net::TcpListener) {
+    let db_url: &'static str = Box::leak(db_url.to_owned().into_boxed_str());
+    create_dev_db(db_url);
+
+    let num_of_cores = std::thread::available_parallelism().unwrap().get() as u32;
+    let is_parent = prefork::Prefork::from_resource(listener)
+        .with_num_processes(num_of_cores)
+        .with_tokio(move |child_num, listener| worker(child_num, db_url, true, listener))
+        .fork()
+        .expect("prefork failed");
+
+    if is_parent {
+        tracing::info!("All workers stopped");
+    }
+}
+
+fn run_non_prefork(db_url: &str, listener: std::net::TcpListener) {
+    create_dev_db(db_url);
+
+    let rt = tokio::runtime::Runtime::new().unwrap();
+    rt.block_on(worker(0, db_url, false, listener));
+}
+
+pub fn run() {
+    let config = setup_config();
+
+    let listener = std::net::TcpListener::bind(config.get_server_url()).expect("bind to port");
+    listener.set_nonblocking(true).expect("non blocking failed");
+    tracing::debug!("listening on http://{}", listener.local_addr().unwrap());
+
+    #[cfg(feature = "prefork")]
+    if config.prefork {
+        run_prefork(&config.db_url, listener);
+        return;
+    }
+
+    run_non_prefork(&config.db_url, listener);
+}