(Feature request) Info, Warning, Alert preformatted frames

[diyoyo]

Describe feature

Hi, I love the feature from NextCloud where you can add some info frames like the screenshot below:

It is very useful to comment on what is written in the rest of the note, or to create "protocols"/"tutorial"/"recipes" kind of notes.

They use the following tags:

• ::: info + ::: (closing)
• ::: error + ::: (closing)
• ::: warn + ::: (closing)

I guess it's a little bit like creating a template for a new code quote, with the difference that the frame itself is being pre-formatted.

It's not visible on this screenshot, but I remember being able to have shades of grey that match the type of message (info, error, warn) in the background.

Additional Information

No response