[MarkdownGithub] 使用块引用高亮显示“注意“和“警告“和其他注意方式的选项

参考来源: https://github.com/orgs/community/discussions/16925

Alerts are an extension of Markdown used to emphasize critical information. On GitHub, they are displayed with distinctive colors and icons to indicate the importance of the content.
提示框是 Markdown 的扩展功能，用于强调关键信息。在 GitHub 上，它们会通过独特的颜色和图标显示，以表明内容的重要性。

An example of all five types:
五种类型的示例：

> [!NOTE]  
> Highlights information that users should take into account, even when skimming.> [!TIP]
> Optional information to help a user be more successful.> [!IMPORTANT]  
> Crucial information necessary for users to succeed.> [!WARNING]  
> Critical content demanding immediate user attention due to potential risks.> [!CAUTION]
> Negative potential consequences of an action.