[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/yampad/keymaps/via/keymap.c

@@ -122,7 +122,7 @@ oled_rotation_t oled_init_user(oled_rotation_t rotation) {
     return OLED_ROTATION_270;  // flips the display 270 degrees
 }
 
-void oled_task_user(void) {
+bool oled_task_user(void) {
   // Host Keyboard Layer Status
   oled_write_P(PSTR("Layer"), false);
   switch (get_highest_layer(layer_state)) {
@@ -159,5 +159,7 @@ void oled_task_user(void) {
       (uint8_t)(rgblight_get_sat() / RGBLIGHT_SAT_STEP),
       (uint8_t)(rgblight_get_val() / RGBLIGHT_VAL_STEP));
   oled_write(led_buf, false);
+
+    return false;
 }
 #endif