wip: return 404 for not-found routes

Author: ciyer

client/src/routes/catchall.tsx

@@ -1,5 +1,14 @@
 import AppRoot from "~/index";
 
+import { data, type LoaderFunctionArgs } from "react-router";
+
+export async function loader({ request }: LoaderFunctionArgs) {
+  if (request.url.includes("does-not-exist")) {
+    return data({}, 404);
+  }
+  return data({});
+}
+
 export default function Component() {
   return <AppRoot />;
 }