[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/crkbd/keymaps/kidbrazil/keymap.c

@@ -172,7 +172,7 @@ void render_slave_oled(void) {
 }
 
 // {OLED Task} -----------------------------------------------//
-void oled_task_user(void) {
+bool oled_task_user(void) {
     // First time out switches to logo as first indication of iddle.
     if (timer_elapsed32(oled_timer) > 100000 && timer_elapsed32(oled_timer) < 479999) {
         // Render logo on both halves before full timeout
@@ -209,5 +209,6 @@ void oled_task_user(void) {
                 }
         }
     }
+    return false;
 }
 #endif