Feature Request: Add support for rendering GitHub blockquote highlight/alert ("Note", "Warning", etc)

This is a new feature added in GitHub. More information can be found in this [GitHub community discussion page](https://github.com/orgs/community/discussions/16925).

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Example of all alert available:

> [!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.