SHELL_WELCOMEMSG: Remove extra newline.
PicoC PIO module: Add entries for including PIO support.
PicoC HEAP_SIZE configuration: Remove the HEAP_SIZE
reference from mizar32_conf.h

This is now done dynamically. Check picoc/platform.h
Include macro for PIO.
PicoC support for PIO module.

Added support for PicoC in PIO platform module.
Now, the PicoC and Lua parts of the PIO module
coexist in src/modules/pio.c
Delete the extra semi-colon.