feat: add startup bulletin; switch to edit mode when click text on md preview.

app/3rd_party/markdown_editor_ot/lib/src/preview.dart

@@ -11,6 +11,7 @@ class MdPreview extends StatefulWidget {
     required this.widgetImage,
     required this.onCodeCopied,
     this.textStyle,
+    this.richTap,
   }) : super(key: key);
 
   final String text;
@@ -24,6 +25,8 @@ class MdPreview extends StatefulWidget {
   /// If [onTapLink] is null,it will open the link with your default browser.
   final TapLinkCallback? onTapLink;
 
+  final VoidCallback? richTap;
+
   @override
   State<StatefulWidget> createState() => MdPreviewState();
 }
@@ -50,6 +53,7 @@ class MdPreviewState extends State<MdPreview>
               image: widget.widgetImage,
               textStyle: widget.textStyle,
               onCodeCopied: widget.onCodeCopied,
+              richTap: widget.richTap,
             );
           },
         ),