[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/crkbd/keymaps/xyverz/keymap.c

@@ -100,7 +100,7 @@ layer_state_t layer_state_set_user(layer_state_t state) {
   return update_tri_layer_state(state, _LOWER, _RAISE, _ADJUST);
 }
 
-#ifdef OLED_DRIVER_ENABLE
+#ifdef OLED_ENABLE
 oled_rotation_t oled_init_user(oled_rotation_t rotation) {
   if (!is_keyboard_master()) {
     return OLED_ROTATION_180;  // flips the display 180 degrees if offhand
@@ -202,4 +202,4 @@ bool process_record_user(uint16_t keycode, keyrecord_t *record) {
   }
   return true;
 }
-#endif // OLED_DRIVER_ENABLE
+#endif // OLED_ENABLE

keyboards/crkbd/keymaps/xyverz/rules.mk

@@ -1 +1,2 @@
-OLED_DRIVER_ENABLE  = yes
+OLED_ENABLE = yes
+OLED_DRIVER = SSD1306