wip: return 404 for not-found routes

Author: ciyer

client/src/routes/catchall.tsx

@@ -1,5 +1,11 @@
 import AppRoot from "~/index";
 
+import { data } from "react-router";
+
+export async function loader() {
+  return data({}, 404);
+}
+
 export default function Component() {
   return <AppRoot />;
 }