refactor(bod): Move brownout handling file from esp_system to esp_hw_support

components/soc/esp32s3/power_supply_periph.c

@@ -0,0 +1,11 @@
+/*
+ * SPDX-FileCopyrightText: 2025 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include "soc/power_supply_periph.h"
+
+const power_supply_signal_conn_t power_supply_periph_signal = {
+    .irq = ETS_RTC_CORE_INTR_SOURCE,
+};