🌍Add `readOnlyMouseCursor` to config mouse cursor type

Related issue: [Bug] Mouse cursor is still text insertion type when `readOnly` is `false` #1752

lib/src/models/config/raw_editor/raw_editor_configurations.dart

@@ -22,7 +22,8 @@ import 'package:flutter/widgets.dart'
         TextFieldTapRegion,
         TextSelectionControls,
         ValueChanged,
-        Widget;
+        Widget,
+        MouseCursor;
 import 'package:meta/meta.dart' show immutable;
 
 import '../../../widgets/others/cursor.dart';
@@ -174,6 +175,9 @@ class QuillRawEditorConfigurations extends Equatable {
   /// The style to be used for the editing cursor.
   final CursorStyle cursorStyle;
 
+  /// The [readOnlyMouseCursor] is used for Windows, macOS when [readOnly] is [true]
+  final MouseCursor readOnlyMouseCursor = SystemMouseCursors.text;
+
   /// Configures how the platform keyboard will select an uppercase or
   /// lowercase keyboard.
   ///

lib/src/widgets/raw_editor/raw_editor_render_object.dart

@@ -5,8 +5,9 @@ import '../../models/documents/document.dart';
 import '../editor/editor.dart';
 import '../others/cursor.dart';
 
-class QuilRawEditorMultiChildRenderObject extends MultiChildRenderObjectWidget {
+class QuillRawEditorMultiChildRenderObject
-  const QuilRawEditorMultiChildRenderObject({
+    extends MultiChildRenderObjectWidget {
+  const QuillRawEditorMultiChildRenderObject({
     required super.children,
     required this.document,
     required this.textDirection,

lib/src/widgets/raw_editor/raw_editor_state.dart

@@ -483,8 +483,10 @@ class QuillRawEditorState extends EditorState
             viewportBuilder: (_, offset) => CompositedTransformTarget(
               link: _toolbarLayerLink,
               child: MouseRegion(
-                cursor: SystemMouseCursors.text,
+                cursor: widget.configurations.readOnly
-                child: QuilRawEditorMultiChildRenderObject(
+                    ? widget.configurations.readOnlyMouseCursor
+                    : SystemMouseCursors.text,
+                child: QuillRawEditorMultiChildRenderObject(
                   key: _editorKey,
                   offset: offset,
                   document: doc,
@@ -515,8 +517,10 @@ class QuillRawEditorState extends EditorState
           link: _toolbarLayerLink,
           child: Semantics(
             child: MouseRegion(
-              cursor: SystemMouseCursors.text,
+              cursor: widget.configurations.readOnly
-              child: QuilRawEditorMultiChildRenderObject(
+                  ? widget.configurations.readOnlyMouseCursor
+                  : SystemMouseCursors.text,
+              child: QuillRawEditorMultiChildRenderObject(
                 key: _editorKey,
                 document: doc,
                 selection: controller.selection,