Document modal update message callbacks

[MinnDevelopment]

No description provided.

[VelvetToroyashi]

Looks great. Thanks! :)

[valdotle]

I think having one disclaimer infobox instead of duplicate ones would do the job as well. However, since I couldn't figure out how to make this suggestion directly within in this pr, I opened another one on the original fork / branch: MinnDevelopment#1

[MinnDevelopment]

@Valle-infinitare documenting it on that endpoint reduces discoverability since you do not have to use it for replies.

[valdotle]

@Valle-infinitare documenting it on that endpoint reduces discoverability since you do not have to use it for replies.

Fair. However, I still think having multiple infoboxes would be slightly unnecessary as there'd be multiple of them visible showing the same information in certain instances.
Maybe linking initial response to interaction response create would work better then.
On the other hand it's only 3 of them and they aren't taking that much space or anything so it's not worth arguing about it too much...