Patch-level release 1.5.2
This patch-level release updates the PIO API to support defining PIO programs with :pio
and ;pio
along with mark words and wrap words and words for allocating space in PIO program memories and conveniently loading PIO programs, adds support for the RP2040 watchdog, adds rounding words for S15.16 numerics, and fixes the value of pi
for S31.32 numerics.