Context Menu for incidenting messages

[Robin5605]

I think similar to #3047, it would be helpful to have some sort of "Quick Incident" context menu that lets Helpers+ quickly right click a message and incident it, instead of having to copy the message link, go to the incidents channel, then come back.

This works great for quickly incidenting messages that are clearly breaking the rules, but is not meant to replace the #incidents channel, because it allows for adding multiple messages for references, descriptions with markdowns, images, attachments, etc.

[wookie184]

One thing to consider (that was discussed in #organisation) is how you can specify whether to ping mods or not. One option is to detect if e.g. @moderators is typed in a description field, and another is to have two different commands.

We were also going to wait to see whether message forwarding could be useful here, though i'm not really sure how that would work.