(feat:layout) Scaffold a good layout

src/ui/App.tsx

@@ -0,0 +1,22 @@
+import { Route, Routes } from "react-router-dom";
+
+import TopBar from "@components/TopBar.tsx";
+import Launcher from "@ui/layout/Launcher.tsx";
+
+import { PageRoutes } from "@app/constants.ts";
+
+import "@css/App.scss";
+
+function App() {
+    return (
+        <div className={"App"}>
+            <TopBar />
+
+            <Routes>
+                <Route path={PageRoutes.HOME} element={<Launcher />} />
+            </Routes>
+        </div>
+    );
+}
+
+export default App;