An option to highlight a "Note" and "Warning" using blockquote

[thomas-k-cameron]

Problem

Github has recently announced that they are supporting highlight feature on their markdown.

I thought it would be nice if mdbook can support that out of the box.
https://github.com/orgs/community/discussions/16925

Proposed Solution

e.g.

> [!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.

Notes

No response

[Marcono1234]

Note that mdBook already has class="warning": https://rust-lang.github.io/mdBook/format/mdbook.html#classwarning

[okalachev]

@Marcono1234, but to make in compatible with GitHub way would be much better.