Consider combining everything into a single crate (just midix)

[dsgallups]

I've been thinking about just moving everything into a single crate.

midix already has a bevy feature, so why not just cut out the middleman?

Also, exposing midix_synth is a bit annoying since it's not great rn.

This would make everything far more cohesive imo. Thoughts?

[dsgallups]

I'm going to do this now that versions have become disparate

[dsgallups]

#68 resolved