refactor(ui, core): Deprecate v3

Signed-off-by: xsahil03x <[email protected]>

packages/stream_chat_flutter/lib/src/user_item.dart

@@ -2,21 +2,26 @@ import 'package:flutter/material.dart';
 import 'package:stream_chat_flutter/src/extension.dart';
 import 'package:stream_chat_flutter/stream_chat_flutter.dart';
 
-///
+/// {@macro user_item}
+@Deprecated("Use 'StreamUserItem' instead")
+typedef UserItem = StreamUserItem;
+
+/// {@template user_item}
 /// It shows the current [User] preview.
 ///
 /// The widget uses a [StreamBuilder] to render the user information
 /// image as soon as it updates.
 ///
 /// Usually you don't use this widget as it's the default user preview used
-/// by [UserListView].
+/// by [StreamUserListView].
 ///
 /// The widget renders the ui based on the first ancestor of type
 /// [StreamChatTheme].
 /// Modify it to change the widget appearance.
-class UserItem extends StatelessWidget {
+/// {@endtemplate}
+class StreamUserItem extends StatelessWidget {
   /// Instantiate a new UserItem
-  const UserItem({
+  const StreamUserItem({
     Key? key,
     required this.user,
     this.onTap,
@@ -38,10 +43,10 @@ class UserItem extends StatelessWidget {
   /// The function called when the image is tapped
   final void Function(User)? onImageTap;
 
-  /// If true the [UserItem] will show a trailing checkmark
+  /// If true the [StreamUserItem] will show a trailing checkmark
   final bool selected;
 
-  /// If true the [UserItem] will show the last seen
+  /// If true the [StreamUserItem] will show the last seen
   final bool showLastOnline;
 
   @override
@@ -58,7 +63,7 @@ class UserItem extends StatelessWidget {
           onLongPress!(user);
         }
       },
-      leading: UserAvatar(
+      leading: StreamUserAvatar(
         user: user,
         onTap: (user) {
           if (onImageTap != null) {