Adds auth guards

src/routes/_authenticated/campaigns.$campaignId.tsx

@@ -0,0 +1,10 @@
+import { createFileRoute } from "@tanstack/react-router";
+
+export const Route = createFileRoute("/_authenticated/campaigns/$campaignId")({
+  component: RouteComponent,
+});
+
+function RouteComponent() {
+  const { campaignId } = Route.useParams();
+  return <div>Hello "/campaigns/{campaignId}"!</div>;
+}