feat(ble): add dtm test code to cert test example on ESP32-C6

examples/phy/cert_test/main/cmd_ble_dtm.h

@@ -0,0 +1,13 @@
+/*
+ * SPDX-FileCopyrightText: 2024-2025 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Unlicense OR CC0-1.0
+ */
+#ifndef __CMD_BLE_DTM_H__
+#define __CMD_BLE_DTM_H__
+#include <stdint.h>
+#include <stdbool.h>
+#include "esp_err.h"
+
+esp_err_t dtm_configuration_command_register(void);
+#endif