Add PROVES Kit RP2040 v4 board

[nateinaction]

Hey CircuitPython team,

I'm a first time contributor looking to add an open source cubesat flight control board. The PID is registered with pid.codes.

This is building locally for me:

make BOARD=proveskit_rp2040_v4
...
   text	   data	    bss	    dec	    hex	filename
    244	      0	      0	    244	     f4	build-proveskit_rp2040_v4/boot2.elf
Memory region         Used Size  Region Size  %age Used
  FLASH_FIRMWARE:      857864 B      1020 KB     82.13%
             RAM:       63208 B       256 KB     24.11%
       SCRATCH_Y:          0 GB         4 KB      0.00%
       SCRATCH_X:          2 KB         4 KB     50.00%
Converted to uf2, output size: 1716224, start address: 0x10000000
Wrote 1716224 bytes to build-proveskit_rp2040_v4/firmware.uf2

Please let me know if you have any feedback. I'm available via GitHub or as nateinaction on the Adafruit discord.

Thank you for your time!

[tannewt]

One question.

[tannewt]

One more extra thing to remove.

[tannewt]

Thanks!