deprecate core lists

packages/stream_chat_flutter_core/lib/src/channel_list_core.dart

@@ -54,6 +54,11 @@ import 'package:stream_chat_flutter_core/src/typedef.dart';
 ///
 /// Make sure to have a [StreamChatCore] ancestor in order to provide the
 /// information about the channels.
+@Deprecated('''
+ChannelListCore is deprecated and will be removed in the next 
+major version. Use StreamChannelListController instead to create your custom list.
+More details here https://getstream.io/chat/docs/sdk/flutter/stream_chat_flutter_core/stream_channel_list_controller
+''')
 class ChannelListCore extends StatefulWidget {
   /// Instantiate a new ChannelListView
   const ChannelListCore({

packages/stream_chat_flutter_core/lib/src/message_search_list_core.dart

@@ -31,6 +31,11 @@ import 'package:stream_chat_flutter_core/src/typedef.dart';
 /// information about the messages.
 /// The widget uses a [ListView.separated] to render the list of messages.
 ///
+@Deprecated('''
+MessageSearchListCore is deprecated and will be removed in the next 
+major version. Use StreamMessageSearchListController instead to create your custom list.
+More details here https://getstream.io/chat/docs/sdk/flutter/stream_chat_flutter_core/stream_message_search_list_controller
+''')
 class MessageSearchListCore extends StatefulWidget {
   /// Instantiate a new [MessageSearchListView].
   /// The following parameters must be supplied and not null:

packages/stream_chat_flutter_core/lib/src/user_list_core.dart

@@ -53,6 +53,11 @@ import 'package:stream_chat_flutter_core/stream_chat_flutter_core.dart';
 ///
 /// The parameters [listBuilder], [loadingBuilder], [emptyBuilder] and
 /// [errorBuilder] must all be supplied and not null.
+@Deprecated('''
+UserListCore is deprecated and will be removed in the next 
+major version. Use StreamUserListController instead to create your custom list.
+More details here https://getstream.io/chat/docs/sdk/flutter/stream_chat_flutter_core/stream_user_list_controller
+''')
 class UserListCore extends StatefulWidget {
   /// Instantiate a new [UserListCore]
   const UserListCore({