feat: 添加README以及example项目，修复plugin的路径，新建basic_intl的本地依赖

example/lib/main.dart

@@ -0,0 +1,58 @@
+import 'package:flutter/material.dart';
+import 'package:permission_handler/permission_handler.dart';
+import 'package:provider/provider.dart';
+import 'package:ai_chat_assistant/app.dart';
+import 'package:ai_chat_assistant/services/message_service.dart';
+import 'package:ai_chat_assistant/enums/vehicle_command_type.dart';
+
+void main() async {
+  WidgetsFlutterBinding.ensureInitialized();
+
+  // 请求麦克风权限
+  if (!await Permission.microphone.isGranted) {
+    await Permission.microphone.request();
+  }
+
+  // 初始化 AI Chat Assistant，注册车控命令回调
+  ChatAssistantApp.initialize(
+    commandCallback: (VehicleCommandType type, Map<String, dynamic>? params) async {
+      // 这里是示例的车控命令处理逻辑
+      print('收到车控命令: $type, 参数: $params');
+      return Future.value((true, {'message': '命令已执行'}));
+    },
+  );
+
+  runApp(
+    ChangeNotifierProvider(
+      create: (_) => MessageService(),
+      child: const MyApp(),
+    ),
+  );
+}
+
+class MyApp extends StatelessWidget {
+  const MyApp({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      title: 'AI Chat Assistant Example',
+      theme: ThemeData(
+        primarySwatch: Colors.blue,
+        useMaterial3: true,
+      ),
+      home: const ExampleHomePage(),
+    );
+  }
+}
+
+class ExampleHomePage extends StatelessWidget {
+  const ExampleHomePage({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return const Scaffold(
+      body: ChatAssistantApp(),
+    );
+  }
+}