refactor: use gorouter for navigation

packages/stream_chat_v1/lib/pages/pinned_messages_screen.dart

@@ -1,10 +1,9 @@
 import 'package:example/utils/localizations.dart';
 import 'package:example/routes/routes.dart';
 import 'package:flutter/material.dart';
+import 'package:go_router/go_router.dart';
 import 'package:stream_chat_flutter/stream_chat_flutter.dart';
 
-import 'channel_page.dart';
-
 class PinnedMessagesScreen extends StatefulWidget {
   const PinnedMessagesScreen({super.key});
 
@@ -103,7 +102,7 @@ class _PinnedMessagesScreenState extends State<PinnedMessagesScreen> {
         },
         onMessageTap: (messageResponse) async {
           final client = StreamChat.of(context).client;
-          final navigator = Navigator.of(context);
+          final router = GoRouter.of(context);
           final message = messageResponse.message;
           final channel = client.channel(
             messageResponse.channel!.type,
@@ -112,12 +111,10 @@ class _PinnedMessagesScreenState extends State<PinnedMessagesScreen> {
           if (channel.state == null) {
             await channel.watch();
           }
-          navigator.pushNamed(
-            Routes.CHANNEL_PAGE,
-            arguments: ChannelPageArgs(
-              channel: channel,
-              initialMessage: message,
-            ),
+          router.pushNamed(
+            Routes.CHANNEL_PAGE.name,
+            params: Routes.CHANNEL_PAGE.params(channel),
+            queryParams: Routes.CHANNEL_PAGE.queryParams(message),
           );
         },
       ),