Add screenshots section

README.md

@@ -34,6 +34,7 @@ Pub: [FlutterQuill]
 - [Flutter Quill](#flutter-quill)
   - [Table of contents](#table-of-contents)
   - [Installation](#installation)
+  - [Screenshots](#screenshots)
   - [Usage](#usage)
   - [Migration](#migration)
   - [Input / Output](#input--output)
@@ -76,6 +77,20 @@ dependencies:
 > If the latest version of [FlutterQuill Extensions] is pre-release, then please use it in order to work with the latest stable version of [FlutterQuill]
 >
 
+## Screenshots
+
+<details>
+<summary>Tap to show/hide screenshots</summary>
+
+<br>
+
+<img src="./example/assets/images/1.png" width="150" alt="Screenshot 1">
+<img src="./example/assets/images/2.png" width="150" alt="Screenshot 2">
+<img src="./example/assets/images/3.png" width="150" alt="Screenshot 3">
+<img src="./example/assets/images/4.png" width="150" alt="Screenshot 4">
+
+</details>
+
 ## Usage
 
 See the `example` directory for a minimal example of how to use FlutterQuill.  You typically just need to instantiate a controller:

doc/readme/cn.md

@@ -24,7 +24,7 @@
 
 ---
 
-> This documentation is outdated. Please check the English version.
+> This documentation is outdated. Please check the [English version](../../README.md).
 
 `FlutterQuill` 是一个富文本编辑器，也是 [Quill](https://quilljs.com/docs/formats) 在 [Flutter](https://github.com/flutter/flutter) 的版本