lush: add off mode
lush: allow main menu to press and hold to cycle between modes
lush: change marquee text to hello
lush: rename Pattern_static to Pattern_selector
lush: factor Pattern_selector logic from Pattern_random
lush: add some disabled audio debugging code
lush: Pattern_marquee: move at a faster speed
lush: update gain resistor
lush: add some support for 16x16 matrix

- deal with alternating flipped x-coords
- fix heart to not assume 8x8
- fix draw_mask to not assume 8x8
lush: add Pattern_race
lush: switch back to 8x8 grid
lush: add configuration pattern
lush: rename Pattern_peak to Pattern_spike
lush: create Pattern_peak_diagonal
lush: add Pattern_peak_noise, initial version of Pattern_peak_ordered