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".
Wireless raises memory usage significantly requiring Pico Unicorn and Pico Scroll (which both need slight refactoring) to be excluded from the build.
The Flash/Filesystem split has changed from a regular Pico build and may change again. Flashing this to a regular Pico *WILL TRASH YOUR FILESYSTEM*.