[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/splitkb/zima/keymaps/drashna/keymap.c

@@ -78,10 +78,10 @@ void render_user_status(void) {
 
 void keyboard_post_init_user(void) { oled_scroll_set_speed(0); }
 
-void oled_task_user(void) {
+bool oled_task_user(void) {
     if (is_asleep) {
         oled_off();
-        return;
+        return false;;
     }
 
     if (timer_elapsed32(oled_timer) < 30000) {
@@ -131,6 +131,7 @@ void oled_task_user(void) {
             oled_off();
         }
     }
+    return false;
 }
 
 void suspend_power_down_user(void) { is_asleep = true; }