[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/keycapsss/plaid_pad/keymaps/oled/keymap.c

@@ -98,7 +98,7 @@ void process_combo_event(uint16_t combo_index, bool pressed) {
   }
 }
 
-#ifdef OLED_DRIVER_ENABLE
+#ifdef OLED_ENABLE
 
 void render_space(void) {
   oled_write_P(PSTR("     "), false);