folder restructuring

lib/widget/info_dialog.dart

@@ -0,0 +1,10 @@
+import 'package:flutter/material.dart';
+
+class InfoDialog {
+  static void show(BuildContext context, String info) {
+    showDialog(context: context, builder: (context) => AlertDialog(
+      content: Text(info),
+      contentPadding: const EdgeInsets.all(20),
+    ));
+  }
+}