feat(endpoints): Add endpoint select changed event.

app/src/endpoints.c

@@ -16,6 +16,7 @@
 #include <zmk/event_manager.h>
 #include <zmk/events/ble_active_profile_changed.h>
 #include <zmk/events/usb_conn_state_changed.h>
+#include <zmk/events/endpoint_selection_changed.h>
 
 #include <logging/log.h>
 LOG_MODULE_DECLARE(zmk, CONFIG_ZMK_LOG_LEVEL);
@@ -242,6 +243,9 @@ static void update_current_endpoint() {
 
         current_endpoint = new_endpoint;
         LOG_INF("Endpoint changed: %d", current_endpoint);
+
+        ZMK_EVENT_RAISE(new_zmk_endpoint_selection_changed(
+            (struct zmk_endpoint_selection_changed){.endpoint = current_endpoint}));
     }
 }
 

app/src/events/endpoint_selection_changed.c

@@ -0,0 +1,10 @@
+/*
+ * Copyright (c) 2021 The ZMK Contributors
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include <kernel.h>
+#include <zmk/events/endpoint_selection_changed.h>
+
+ZMK_EVENT_IMPL(zmk_endpoint_selection_changed);