Build how composer interacts with global state

WIP - Determined design for dealing with compsoition requirements

JerkyTreats

Brute forced the relative keys of a 7 note scale into global state.

Ended up doing this because I realized SetThird was copypasta from SetTonic, and was acutally updating the state for SetTonic!

So I added a SetThird.

Then I added Second, Fourth, Fifth, Sixth, Seventh.

And instrumented it into Composer as it’s the entity that is actually interested in consuming this state data.