[Keyboard] Adding RGBKB Zygomorph Keyboard (#5841)

[Keyboard] Adding RGBKB Zygomorph Keyboard (#5841)

* Initial Zygomorph 5x6 code

Split is not working yet

* layout changes

implement 4 row config option (not done yet), remove layout comments in layout.c

* Zygomorph layouts for 5x12, 5x6, 4x12, and 4x6

Also, info.json *should* be nearly usable
 for the configurator

* temporary fix for pin D5 being broken

* show D5 issue comment

* add build notes

* Pin B7 broken in split why?

* remove fix

* Fix some pin assignments

* begin to fix keymap

* Create new 5x6 layout

* update key positions

* Initial Zygomorph 5x6 code

Split is not working yet

* layout changes

implement 4 row config option (not done yet), remove layout comments in layout.c

* Zygomorph layouts for 5x12, 5x6, 4x12, and 4x6

Also, info.json *should* be nearly usable
 for the configurator

* temporary fix for pin D5 being broken

* show D5 issue comment

* add build notes

* Pin B7 broken in split why?

* remove fix

* Fix some pin assignments

* begin to fix keymap

* Create new 5x6 layout

* Rough first pass at split common conversion.
Keymap cleanup to cover just the basics.
Broke OLED code out into separate example.

* Fix readme

* Removal of old encoder / oled driver, fix for layout macros

* small update

* xulkal zygomorph keymaps

* Removed the LED_MIRRORED option as leds are always mirrored on Zygomorph

* Xulkal keymaps update

* split rgb light support

* fix line endings

* Apply suggestions from code review

Co-Authored-By: zvecr <git@zvecr.com>
* More layout and compile fixes from pr review

* Cleaning up rules.mk files

* Apply suggestions from code review

Co-Authored-By: zvecr <git@zvecr.com>
* Updating defaults

* Apply suggestions from code review

Co-Authored-By: noroadsleft <18669334+noroadsleft@users.noreply.github.com>