Pico 2 🥳

[Gadgetoid]

TODO

• Replace .svg for front/back (in progress)
• Add new UART functions
• Update the extra pin functions in the table at the bottom, I don't know how correct these are now... (No change, I don't think!)
• Make sure references to RP2040 are expunged
• Address issues at Pico 2 pico.pinout.xyz#19 (test pad will get fixed by the new images)

[cfpwastaken]

Now that we have 3 different pico versions (excluding H-versions) with a 4th one coming maybe the link to the other version (the one that shows "Pico W pinout" on pico.pinout.xyz and "Pico pinout" on picow.pinout.xyz) should be reworked to a select menu?