对话页面新增，实现最最基础的部分

lib/pages/chat/index.dart

@@ -0,0 +1,44 @@
+import 'dart:math';
+import 'package:flutter/material.dart';
+import 'package:flutter_chat_core/flutter_chat_core.dart';
+import 'package:flutter_chat_ui/flutter_chat_ui.dart';
+
+class ChatPage extends StatefulWidget {
+  const ChatPage({super.key});
+  @override
+  State<ChatPage> createState() => _ChatPageState();
+}
+
+class _ChatPageState extends State<ChatPage> {
+  final _chatController = InMemoryChatController();
+
+  @override
+  void dispose() {
+    _chatController.dispose();
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      body: Chat(
+        chatController: _chatController,
+        currentUserId: 'user1',
+        onMessageSend: (text) {
+          _chatController.insertMessage(
+            TextMessage(
+              // Better to use UUID or similar for the ID - IDs must be unique
+              id: '${Random().nextInt(1000) + 1}',
+              authorId: 'user1',
+              createdAt: DateTime.now().toUtc(),
+              text: text,
+            ),
+          );
+        },
+        resolveUser: (UserID id) async {
+          return User(id: id, name: 'John Doe');
+        },
+      ),
+    );
+  }
+}