Chatting mode

[Craftplacer]

It would be nice if there could be another shortcut (one icon for normal Fediverse, another one for chatting) to launch Kaiteki in "chatting-only" mode.
It will be a cut down version of the app experience just for chatting with people.

This would split the app into two modes, but under the same binary.

The question remaining if this is desirable for users, especially in daily use, and whether if the user has to switch between those two modes often.