Use same formatting settings

I think it's a good idea to use the same formatting rules as in the main briar app now that we're going to continue working on this and eventually want to copy over significant parts to the main app.

I originally applied the formatting rules while I was in the middle of my initial work on #2019 and this created messy diffs. So I applied the formatting in isolation in this separate branch and rebased my current changes on top of that. Of course this is a big chunk of changes now and I don't know if we really want to do this. I think if we want to do it, now is a good time, as we only have that one other MR other branch online from @akwizgran open which doesn't include too many changes, so it can be rebased relatively easy.