[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 <drashna@live.com>
Co-authored-by: mtei <2170248+mtei@users.noreply.github.com>

keyboards/halfcliff/halfcliff.c

@@ -16,7 +16,7 @@
 
 #include "halfcliff.h"
 
-#ifdef OLED_DRIVER_ENABLE
+#ifdef OLED_ENABLE
 
 // Defines names for use in layer keycodes and the keymap
 enum layer_names {

keyboards/halfcliff/rules.mk

@@ -24,6 +24,6 @@ SPLIT_KEYBOARD = yes
 ENCODER_ENABLE = no
 POINTING_DEVICE_ENABLE = no
 CUSTOM_MATRIX = yes
-OLED_DRIVER_ENABLE = no
+OLED_ENABLE = no
 
 SRC += matrix.c