[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/handwired/d48/keymaps/anderson/keymap.c

@@ -251,7 +251,7 @@ oled_rotation_t oled_init_user(oled_rotation_t rotation) {
     return OLED_ROTATION_0;
 }
 
-void oled_task_user(void) {
+bool oled_task_user(void) {
     /* Host Keyboard Layer Status */
     uint8_t current_layer = get_highest_layer(layer_state);
 
@@ -337,5 +337,6 @@ void oled_task_user(void) {
         }
     }
 
+    return false;
 }
 #endif

keyboards/handwired/d48/keymaps/default/keymap.c

@@ -196,7 +196,7 @@ oled_rotation_t oled_init_user(oled_rotation_t rotation) {
     return OLED_ROTATION_0;
 }
 
-void oled_task_user(void) {
+bool oled_task_user(void) {
     /* Host Keyboard Layer Status */
     uint8_t current_layer = get_highest_layer(layer_state);
 
@@ -282,5 +282,6 @@ void oled_task_user(void) {
         }
     }
 
+    return false;
 }
 #endif