* add in drewguy's code with a few additions to the keymap
* add VID and PID
* fixup defualt keymap
* add VIA keymap
* thanks to bigchimpo for reminding me to put an Fn key in the default keymap
* make sure we have the right gitugithub url for drew
* remove description as per PR checklist
* append readme with more information
* Update keyboards/holyswitch/southpaw75/config.h
* Update keyboards/holyswitch/southpaw75/info.json
* Update keyboards/holyswitch/southpaw75/southpaw75.h
* Update keyboards/holyswitch/southpaw75/info.json
Joel Challis
MechMerlin