feat: add build:test script and improve documentation code blocks

- Added a new script `build:test` to generate test cases from documentation code examples.
- Enhanced documentation files by ensuring proper code block formatting and adding missing closing backticks.
- Updated various markdown files to include new code blocks and fixed formatting issues.

packages/artplayer-vitepress/docs/en/advanced/global.md

@@ -251,6 +251,8 @@ var art = new Artplayer({
     url: '/assets/sample/404.mp4',
 });
 
+```
+
 ## CONTROL_HIDE_TIME
 
 The delay time in milliseconds for auto-hiding the bottom control bar. Default is `3000`.
@@ -499,6 +501,8 @@ var art = new Artplayer({
 art.contextmenu.show = true;
 art.setting.show = true;
 
+```
+
 ## FULLSCREEN_WEB_IN_BODY
 
 Determines whether to mount the player under the `body` element during web fullscreen mode. Defaults to `true`.
@@ -563,4 +567,5 @@ var art = new Artplayer({
 });
 
 // Only destroys the UI, does not actively clear src
-art.destroy();
+art.destroy();
+```