chore: change loading text to loading spinner

src/app/page.tsx

@@ -25,5 +25,9 @@ export default function Home() {
     );
   }
 
-  return <>Loading...</>;
+  return (
+    <main className='w-full h-full min-h-screen flex flex-row justify-center items-center'>
+      <span className='loading loading-spinner loading-lg'></span>
+    </main>
+  );
 }