Sodium was created before the existence of the CaffeineMC organization, and still uses package names belonging to my personal domain. We should migrate existing code from the me.jellysquid.mods package and to net.caffeinemc package instead.

This will also give us an opportunity to refactor some classes that are currently organized in a poor fashion (for example, the renderer configuration code being in user interface packages). We've had to wait on doing this since making the change during a point release would have been disruptive, as a lot of mods mixin to our code and depend on these internal types.

Resolved with 82d6217.