feat(lst): tan stack routes added with protected routes

frontend/src/routes/_auth/profile.tsx

@@ -0,0 +1,9 @@
+import {createFileRoute} from "@tanstack/react-router";
+
+export const Route = createFileRoute("/_auth/profile")({
+    component: RouteComponent,
+});
+
+function RouteComponent() {
+    return <div>Hello "/profile"!</div>;
+}