Add support for github admonition

[lyrixx]

Description

On https://commonmark.thephpleague.com/, we can read

The only PHP library fully compatible with the CommonMark and GitHub-Flavored Markdown specs

But ATM, the library lakes support for admonitions

Is this something you are interested in?

Example

> [!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.

=>

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.

Did this project help you today? Did it make you happy in any way?

YES! We use it everyday, and we love it 💛

[colinodell]

Thanks for reaching out! Please see #1012 which covers this topic.

YES! We use it everyday, and we love it 💛

I really appreciate that feedback ❤️