[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/cassette42/common/oled_helper.c

@@ -1,4 +1,4 @@
-#ifdef OLED_DRIVER_ENABLE
+#ifdef OLED_ENABLE
 #    include QMK_KEYBOARD_H
 #    include <stdio.h>
 #    include <string.h>

keyboards/cassette42/common/oled_helper.h

@@ -1,4 +1,4 @@
-#ifdef OLED_DRIVER_ENABLE
+#ifdef OLED_ENABLE
 
 void render_logo(void);
 
@@ -19,4 +19,4 @@ void render_led_status(void);
 #    define UPDATE_LED_STATUS()
 #    define RENDER_LED_STATUS(a)
 
-#endif
+#endif

keyboards/cassette42/keymaps/default/keymap.c

@@ -64,7 +64,7 @@ bool process_record_user(uint16_t keycode, keyrecord_t *record) {
     return true;
 }
 
-#ifdef OLED_DRIVER_ENABLE
+#ifdef OLED_ENABLE
 #    include <stdio.h>
 #    include <string.h>
 

keyboards/cassette42/rules.mk

@@ -21,6 +21,7 @@ RGBLIGHT_ENABLE = yes       # Enable keyboard RGB underglow
 BLUETOOTH_ENABLE = no       # Enable Bluetooth
 AUDIO_ENABLE = no           # Audio output
 ENCODER_ENABLE = yes
-OLED_DRIVER_ENABLE = yes
+OLED_ENABLE = yes
+OLED_DRIVER = SSD1306
 
 SRC += ./common/oled_helper.c