Add Pico quickpin

[Allstreamer]

Create Raspberry PI pico quickpin based on the Pico Docs. (Also tested on Pico H)

[xs5871]

Pi Pico doesn't have a pro micro footprint. It would need a seperate footprint directory.

[Allstreamer]

Not sure what would be the best structure.
Right now it's compatible with both the pico H & pico W so i was thinking of naming it pico but that would make the import:

from kmk.quickpins.pico.pico import pinout

which feels a bit weird,
i'm thinking of making it top level or making a raspberry pi folder?
IDK not sure if i should just keep the name as pico.

For Refrence:

# Pico folder
from kmk.quickpin.pico.pico import pinout

# Top Level
from kmk.quickpin.pico import pinout

# Raspi folder
from kmk.quickpin.raspi.pico import pinout
# or
from kmk.quickpin.raspberry.pico import pinout
# or 
from kmk.quickpin.raspberrypi.pico import pinout

[xs5871]

Of course it looks weird. quickpin is meant to translate physical pin names / mappings from different board layouts. You're translating from the pi pico to the pi pico, which is kind of pointless imo... but if you think that's a good addition, then kmk.quickpin.pico.pico it is.

[kdb424]

I've seen some pico clones, but AFIK, I haven't seen any that change the pinout's to the point of having a use for quickpin. The only use I can see for this is not having to find the pinout with an image for people reading the code, but it wouldn't have the intended primary use of quickpin.