Callouts should convert the type on multiple paragraphs

[juliusknorr]

One minor thing that i would like would be if removing multiline callouts worked like changing them to a different type. When i am on one line and i turn the callout off it would be nice if the entire callout would be gone - not just the line i am on. Could be done separately though...

Originally posted by @max-nextcloud in #2227 (review)

[juliusknorr]

@max-nextcloud @vinicius73 Did you already have any ideas how that could be tackled?

[max-nextcloud]

@juliushaertl I had a brief look but it did not seem obvious to me. Most likely needs to be handled on the prosemirror level rather than tiptap.

[juliusknorr]

Still valid, let's add that to the list of things to look into during the development cycle of 26.