feat: 主页面功能

lib/pages/first/pages/first_page.dart

@@ -0,0 +1,18 @@
+import 'package:flutter/material.dart';
+
+class FirstPage extends StatefulWidget {
+  const FirstPage({super.key});
+
+  @override
+  State<StatefulWidget> createState() {
+    return _RootPageState();
+  }
+}
+
+class _RootPageState extends State<FirstPage> {
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold();
+  }
+}