test(better auth): implementation start of better auth

frontend/src/main.tsx

@@ -1,12 +1,15 @@
 import { StrictMode } from "react";
 import ReactDOM from "react-dom/client";
 import "./index.css";
-
 import { RouterProvider, createRouter } from "@tanstack/react-router";
+import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
 
 // Import the generated route tree
 import { routeTree } from "./routeTree.gen";
 
+// Create a client
+const queryClient = new QueryClient();
+
 // Create a new router instance
 const router = createRouter({ routeTree, basepath: "/lst/app" });
 
@@ -19,6 +22,8 @@ declare module "@tanstack/react-router" {
 
 ReactDOM.createRoot(document.getElementById("root")!).render(
     <StrictMode>
-        <RouterProvider router={router} />
+        <QueryClientProvider client={queryClient}>
+            <RouterProvider router={router} />
+        </QueryClientProvider>
     </StrictMode>
 );