Add 'loop' or play once button to SongControls

[brandongregoryscott]

Similar to the upcoming "Play Once" functionality in InstrumentSettings, update the workstation page's SongControls component to toggle the play behavior between looping (what it currently does) or playing once (based on calculated duration of the track)

[brandongregoryscott]

Right now, the loop property for the useToneAudio hook controls this. I think we should be able to set this false with a button/state value in the SongControls component!