Add callout block option on / command

[virgile-dev]

Is your feature request related to a problem? Please describe.
Sometimes I want a block to standout to give a warning a provide an info.

Describe the solution you'd like
Notion has a nice solution for this, they call it callout. It's available from the / menu in the editor.
The block displays differently from the others (more margin, different background color, starts with an emoji), the text color and background color can still be chosen by the user.

Describe alternatives you've considered
Using background color for a block to stand out

Additional context
Add any other context or screenshots about the feature request here.

[YousefED]

You can achieve this easily with custom blocks. There's an example here: https://www.blocknotejs.org/examples/custom-schema/alert-block. Does that help?

Would love to learn what you're building by the way!

[virgile-dev]

Hey thanks for the tip !
I'm working on Docs with Samuel at the French state.
Do you want me to close the issue ?

[YousefED]

Ah nice! I'll close it for now :). If creating a custom block for some reason doesn't cut it, let's reopen and discuss!