feat: add React layout and a topbar allowing for easy logins

frontend/src/App.tsx

@@ -1,12 +1,18 @@
-import { Routes, Route } from "react-router-dom";
+import { Navigate, Route, Routes } from "react-router-dom";
+import AppLayout from "./components/AppLayout";
+import LoginPage from "./pages/Login";
 import UploadPage from "./pages/Upload";
 import StatPage from "./pages/Stats";
 
 function App() {
   return (
     <Routes>
-      <Route path="/upload" element={<UploadPage />} />
-      <Route path="/stats" element={<StatPage />} />
+      <Route element={<AppLayout />}>
+        <Route path="/" element={<Navigate to="/login" replace />} />
+        <Route path="/login" element={<LoginPage />} />
+        <Route path="/upload" element={<UploadPage />} />
+        <Route path="/stats" element={<StatPage />} />
+      </Route>
     </Routes>
   );
 }