feat(llc,core,ui): send used package in the headers

packages/stream_chat/lib/src/client/client.dart

@@ -25,7 +25,6 @@ import 'package:stream_chat/src/core/models/member.dart';
 import 'package:stream_chat/src/core/models/message.dart';
 import 'package:stream_chat/src/core/models/own_user.dart';
 import 'package:stream_chat/src/core/models/user.dart';
-import 'package:stream_chat/src/core/platform_detector/platform_detector.dart';
 import 'package:stream_chat/src/core/util/utils.dart';
 import 'package:stream_chat/src/db/chat_persistence_client.dart';
 import 'package:stream_chat/src/event_type.dart';
@@ -44,10 +43,6 @@ final _levelEmojiMapper = {
   Level.SEVERE: '🚨',
 };
 
-final _userAgent = 'stream-chat-dart-client-'
-    '${CurrentPlatform.name}-'
-    '${PACKAGE_VERSION.split('+')[0]}';
-
 /// The official Dart client for Stream Chat,
 /// a service for building chat applications.
 /// This library can be used on any Dart project and on both mobile and web apps
@@ -86,7 +81,7 @@ class StreamChatClient {
       location: location,
       connectTimeout: connectTimeout,
       receiveTimeout: receiveTimeout,
-      headers: {'X-Stream-Client': _userAgent},
+      headers: {'X-Stream-Client': defaultUserAgent},
     );
 
     _chatApi = chatApi ??
@@ -106,7 +101,7 @@ class StreamChatClient {
           tokenManager: _tokenManager,
           handler: handleEvent,
           logger: detachedLogger('🔌'),
-          queryParameters: {'X-Stream-Client': _userAgent},
+          queryParameters: {'X-Stream-Client': defaultUserAgent},
         );
 
     _retryPolicy = retryPolicy ??