[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/keycapsss/plaid_pad/keymaps/default/keymap.c

@@ -35,8 +35,9 @@ void keyboard_post_init_user(void) {
 
 // Rev3 and above only
 #ifdef OLED_ENABLE
-void oled_task_user(void) {
+bool oled_task_user(void) {
   oled_write_ln_P(PSTR("Plaid-Pad ///////////"), false);
+    return false;
 }
 #endif
 

keyboards/keycapsss/plaid_pad/keymaps/oled/keymap.c

@@ -117,9 +117,10 @@ void oled_render_layer_state(void) {
 }
 
 
-void oled_task_user(void) {
+bool oled_task_user(void) {
   oled_write_ln_P(PSTR("Plaid-Pad ///////////"), false);
   oled_render_layer_state();
+    return false;
 }
 
 #endif

keyboards/keycapsss/plaid_pad/keymaps/via/keymap.c

@@ -62,8 +62,9 @@ void keyboard_post_init_user(void) {
 
 // Rev3 and above only
 #ifdef OLED_ENABLE
-void oled_task_user(void) {
+bool oled_task_user(void) {
   oled_write_ln_P(PSTR("Plaid-Pad ///////////"), false);
+    return false;
 }
 #endif