For both APA102 and WS2812 the pins used on the same PIO must be in the same range.
The GPIO base offset applies to the whole PIO and not individual state machines.
This means that for APA102 both data and clock must be in the same pin range,
ie: either 16-48 inclusive or 0-31 inclusive.
Pico Scroll and Pico Unicorn were allocating static buffers for gamma and font data respectively.
Make Pico Scroll's `__bitmap` static.
Move Pico Unicorn's three GAMMA tables to one 14-bit table in "pimoroni_common.hpp". Rename "GAMMA" to "GAMMA_8BIT".
Moves the 256 entry GAMMA table into pimoroni_common.
Should probably be added into a library so MicroPython is built with only one instance of the table.
Adds an ifdef guard around `pio_sm_unclaim` that prevents it being called when MicroPython cleans up/finalizes classes.
For some reason this appeared to be causing a hardfault.
Phil Howard