feature: add localization and tool tips to expandable buttons

additionally, migrate to newer flutter versions

Author: Alexander Petermann

README.md

@@ -3,14 +3,15 @@
 This is a fork of [simple_markdown_editor by zahnia88](https://github.com/zahniar88/simple_markdown_editor)
 with contributions from [fossfreaks](https://github.com/fossfreaks)
 
-Simple markdown editor library For flutter. 
+Simple markdown editor library For flutter.
 For demo video, you can see it at this url [Demo](https://youtu.be/aYBeXXDoNPo)
 
-
 ## Features
+
 - ✅ Convert to Bold, Italic, Strikethrough
 - ✅ Convert to Code, Quote, Links
 - ✅ Convert to Heading (H1, H2, H3).
+- ✅ Convert to order list
 - ✅ Convert to unorder list and checkbox list
 - ✅ Support multiline convert
 - ✅ Support auto convert emoji
@@ -21,11 +22,26 @@ Add dependencies to your `pubspec.yaml`
 
 ```yaml
 dependencies:
-    markdown_editor_plus: ^latest
+  markdown_editor_plus: ^latest
 ```
 
 Run `flutter pub get` to install.
 
+Add the localization delegate:
+
+```dart
+return MaterialApp(
+    localizationsDelegates: [
+        MarkdownEditorPlusLocalizations.delegate, // <- Add this line
+        GlobalMaterialLocalizations.delegate,
+        GlobalWidgetsLocalizations.delegate,
+        GlobalCupertinoLocalizations.delegate,
+    ],
+    home: HomeScreen(),
+);
+
+```
+
 ## How it works
 
 Import library
@@ -96,4 +112,4 @@ MarkdownAutoPreview(
 )
 ```
 
-___
+---

example/lib/main.dart

@@ -1,24 +1,35 @@
 import 'package:flutter/material.dart';
 import 'package:markdown_editor_plus/markdown_editor_plus.dart';
+import 'package:flutter_localizations/flutter_localizations.dart';
 
 void main() {
   runApp(const MyApp());
 }
 
 class MyApp extends StatelessWidget {
-  const MyApp({Key? key}) : super(key: key);
+  const MyApp({super.key});
 
   @override
   Widget build(BuildContext context) {
     return const MaterialApp(
       debugShowCheckedModeBanner: false,
+      localizationsDelegates: [
+        MarkdownEditorPlusLocalizations.delegate, // Add this line
+        GlobalMaterialLocalizations.delegate,
+        GlobalWidgetsLocalizations.delegate,
+        GlobalCupertinoLocalizations.delegate,
+      ],
+      supportedLocales: [
+        Locale('en'), // English
+        Locale('de'), // German
+      ],
       home: HomeScreen(),
     );
   }
 }
 
 class HomeScreen extends StatefulWidget {
-  const HomeScreen({Key? key}) : super(key: key);
+  const HomeScreen({super.key});
 
   @override
   State<HomeScreen> createState() => _HomeScreenState();
@@ -50,6 +61,7 @@ class _HomeScreenState extends State<HomeScreen> {
             ),
             emojiConvert: true,
           ),
+          MarkdownField(),
         ],
       ),
     );