add some config to project and change come simple ui

lib/provider/data_util.dart

@@ -0,0 +1,16 @@
+import 'package:shared_preferences/shared_preferences.dart';
+
+class DataUtil {
+  static SharedPreferences? _prefs;
+
+  static Future<SharedPreferences> getInstance() async {
+    if (_prefs == null) {
+      _prefs = await SharedPreferences.getInstance();
+    }
+    return _prefs!;
+  }
+}
+
+class DataKey {
+  static final String SETTING = "setting";
+}