[Big] Mbin API support

[FitikWasTaken]

Is Your Feature Request Related to a Problem?

Right now Thunder only supports Lemmy, but I would love to see Mbin support as well, at least partial one

Interstellar, another client supports both Lemmy and Mbin, but it has no IOS support, so Thunder could be the first Mbin IOS client and fill this niche

Feature Description

I have seen #177 and decided to do a separate feature request, as you have discussed the possibility of adding it in the future.

Mbin is a fork of now-dead Kbin, all active Kbin instances have switched to Mbin. Mbin is the second most popular software in the Thrediverse after Lemmy.

Mbin has it's own API and even tho it's a big feature request, it would be nice to be able to:

Login in using Mbin instances, create threads, reply to comments, vote on threads, subscribe to communities (magazines as they're called on Mbin) and do other things you can do on Thunder right now.

Alternative Solutions

No response

Additional Context

There's Mbin API documentation

https://docs.joinmbin.org/ https://kbin.melroy.org/api/docs