This change removes file-relative include paths and adds the project root as a global include path.
* Project root added to CMakeLists.txt so that all targets can find includes
* Project root added micropython.cmake so that targets used by the MicroPython build can find includes
Note: pico-boilerplate projects must set this include path
Fixes paths that only resolve when the top-level directory is named "pimoroni-pico"
and is adjacent to the "micropython" directory when building a MicroPython release.
ZodiusInfuser