Add brightness level API to OLED driver (#10772)

* Add brightness level API to OLED driver

* Set default brightness to 255

keyboards/handwired/onekey/keymaps/pytest_nocpp/keymap.c

@@ -1,23 +0,0 @@
-#include QMK_KEYBOARD_H
-#include "audio.h"
-
-/* THIS FILE WAS GENERATED AND IS EXPERIMENTAL!
- *
- * This file was generated by qmk-compile-json. You may or may not want to
- * edit it directly.
- */
-
-const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
-	[0] = LAYOUT(KC_ENTER)
-};
-
-void encoder_update_user(uint8_t index, bool clockwise) {
-	if (index == 0) {
-		if (clockwise) {
-			tap_code(KC_UP);
-		} else {
-			tap_code(KC_DOWN);
-		}
-	}
-
-};

keyboards/handwired/onekey/pytest/templates/keymap.json

@@ -1,3 +0,0 @@
-{
-  "documentation": "This file is a keymap.json file for handwired/onekey/pytest"
-}