fix(ui, core): make message input regex caseInsensitive.

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

packages/stream_chat_flutter/lib/src/message_input/stream_message_input.dart

@@ -1042,6 +1042,7 @@ class StreamMessageInputState extends State<StreamMessageInput>
   CancelableOperation? _enrichUrlOperation;
   final _urlRegex = RegExp(
     r'(?:(?:https?|ftp):\/\/)?[\w/\-?=%.]+\.[\w/\-?=%.]+',
+    caseSensitive: false,
   );
 
   void _checkContainsUrl(String value, BuildContext context) async {

packages/stream_chat_flutter_core/lib/src/message_text_field_controller.dart

@@ -41,7 +41,10 @@ class MessageTextFieldController extends TextEditingController {
     }
 
     return TextSpan(text: text, style: style).splitMapJoin(
-      RegExp(pattern.keys.map((it) => it.pattern).join('|')),
+      RegExp(
+        pattern.keys.map((it) => it.pattern).join('|'),
+        caseSensitive: false,
+      ),
       onMatch: (match) {
         final text = match[0]!;
         final key = pattern.keys.firstWhere((it) => it.hasMatch(text));