Update file_picker

Add resources page

Optimize more detail

lib/models/common.dart

@@ -1,24 +0,0 @@
-import 'package:fl_clash/enum/enum.dart';
-
-class Result<T> {
-  String? message;
-  ResultType type;
-  T? data;
-
-  Result({
-    this.message,
-    required this.type,
-    this.data,
-  });
-
-  Result.success([this.data])  : type = ResultType.success,
-        message = null;
-
-  Result.error([this.message])  : type = ResultType.error,
-        data = null;
-
-  @override
-  String toString() {
-    return 'Result{message: $message, type: $type, data: $data}';
-  }
-}