✨ Add Ender-3 V2 LCD support for SKR 3/EZ

[vrooze]

Description

Submitting my local changes made to get this board working on my Ender 3 V2 Neo.

Added ASCII diagram to pins and an error prompt warning users the Ender 3 needs a custom ribbon cable Added pin mapping for the board Added support to Coditionals_adv.h

[vrooze]

Validate pins claims I need to format the pins file but the make command reports nothing to be done:

make format-pins
make: Nothing to be done for 'format-pins'.