Interaction Callback Type UPDATE_MESSAGE in MESSAGE app commands

[Vioshim]

Given user apps are now in beta, it's quite essential for us bot developers to have the ability of editing messages without creating many notifications to the DM user. For this reason, I'd like to request allowing message app commands to work with bot responses.

That way the users aren't forced to delete or keep sending in dms, instead of just simply being able to have an edit in place. Currently interactions allow to edit in the first 15 minutes, but it's essential to allow this interaction response for most use cases that require it such as being able to edit someone's embeds in dms, etc.

My current use case I have for this at the moment is my bot which allows users to send character responses for multiple purposes, such as D&D, Roleplaying games, Presentation Cards, etc. So being able to edit these user generated messages would be quite essential for the application be it in private groups or servers.