🍱 Add splash screen

lib/widgets/post/post_item.dart

@@ -0,0 +1,23 @@
+import 'package:flutter/material.dart';
+import 'package:surface/types/post.dart';
+
+class PostItem extends StatelessWidget {
+  final SnPost data;
+  const PostItem({super.key, required this.data});
+
+  @override
+  Widget build(BuildContext context) {
+    return Column(
+      children: [],
+    );
+  }
+}
+
+class _PostContentPublisher extends StatelessWidget {
+  const _PostContentPublisher({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return const Placeholder();
+  }
+}