[linting_tool] Add lint rules list (#856)

experimental/linting_tool/lib/model/rule.dart

@@ -0,0 +1,36 @@
+// Copyright 2021 The Flutter team. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:equatable/equatable.dart';
+import 'package:json_annotation/json_annotation.dart';
+
+part 'rule.g.dart';
+
+@JsonSerializable()
+class Rule extends Equatable {
+  final String name;
+  final String description;
+  final String group;
+  final String maturity;
+  final List<String> incompatible;
+  final List<String> sets;
+  final String details;
+
+  const Rule({
+    required this.name,
+    required this.description,
+    required this.group,
+    required this.maturity,
+    required this.incompatible,
+    required this.sets,
+    required this.details,
+  });
+
+  factory Rule.fromJson(Map<String, dynamic> json) => _$RuleFromJson(json);
+
+  Map<String, dynamic> toJson() => _$RuleToJson(this);
+
+  @override
+  List<Object?> get props => [name];
+}