feat(pm): Clear HID data before soft off.

* Make sure the connected host has no held HID usages before we sleep.

app/src/pm.c

@@ -13,6 +13,8 @@
 #include <zephyr/logging/log.h>
 LOG_MODULE_DECLARE(zmk, CONFIG_ZMK_LOG_LEVEL);
 
+#include <zmk/endpoints.h>
+
 #define HAS_WAKERS DT_HAS_COMPAT_STATUS_OKAY(zmk_soft_off_wakeup_sources)
 
 #if HAS_WAKERS
@@ -29,6 +31,8 @@ int zmk_pm_soft_off(void) {
     size_t device_count;
     const struct device *devs;
 
+    zmk_endpoints_clear_current();
+
     device_count = z_device_get_all_static(&devs);
 
     // There may be some matrix/direct kscan devices that would be used for wakeup