RP2040-Zero not recognised by pi

[Sineos]

1. Build the firmware for the RP2040
   
   
2. Connect the Pico to your host while holding the boot button presse
3. Use the mount method to copy klipper.uf2 to the mount
4. Use the dmesg method to check how the Pico is registered

Usually the Pico are quite easy and trouble-free to flash