[Core] Change OLED task function to be boolean (#14864)

* [Core] Add kb level callbacks to OLED driver

* Update keyboards and keymaps

* Update docs

* Update userspace configs

* Add fix for my keymap ...

* update lefty

keyboards/helix/rev2/keymaps/edvorakjp/oled.c

@@ -56,7 +56,7 @@ oled_rotation_t oled_init_user(oled_rotation_t rotation) {
     return is_keyboard_left() ? rotation : rotation ^ OLED_ROTATION_180;
 }
 
-void oled_task_user(void) {
+bool oled_task_user(void) {
     if (is_keyboard_left()) {
         render_mode_icon(!get_enable_kc_lang());
         render_layer_state();
@@ -64,5 +64,6 @@ void oled_task_user(void) {
     } else {
         render_logo();
     }
+    return false;
 }
 #endif  // OLED_ENABLE