[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/montsinger/rebound/rev4/keymaps/rossman360/keymap.c

@@ -83,7 +83,7 @@ case _DEL:
     return true;
 }
 
-#ifdef OLED_DRIVER_ENABLE
+#ifdef OLED_ENABLE
 void oled_task_user(void) {
     // Host Keyboard Layer Status
     oled_write_P(PSTR(""), false);

keyboards/montsinger/rebound/rev4/keymaps/rossman360/rules.mk

@@ -1,4 +1,4 @@
 MOUSEKEY_ENABLE = no
 CONSOLE_ENABLE = no
 COMMAND_ENABLE = no
-OLED_DRIVER_ENABLE = no
+OLED_ENABLE = no