[Core] Refactor OLED to allow easy addition of other types (#13454)

* add docs

* core changes

* update keyboards to new OLED

* updated users to new OLED

* update layouts to new OLED

* fixup docs

* drashna's suggestion

* fix up docs

* new keyboards with oled

* core split changes

* remaining keyboard files

* Fix The Helix keyboards oled options

* reflect develop

Co-authored-by: Drashna Jaelre <[email protected]>
Co-authored-by: mtei <[email protected]>

users/drashna/rules.mk

@@ -64,7 +64,7 @@ ifeq ($(strip $(PROTOCOL)), VUSB)
 endif
 
 CUSTOM_OLED_DRIVER ?= yes
-ifeq ($(strip $(OLED_DRIVER_ENABLE)), yes)
+ifeq ($(strip $(OLED_ENABLE)), yes)
     ifeq ($(strip $(CUSTOM_OLED_DRIVER)), yes)
         SRC += oled_stuff.c
         OPT_DEFS += -DCUSTOM_OLED_DRIVER_CODE