Feature/add who am i and you are services (#1024)

* Added Who-Am-I-Request encoding, decoding, unit tests, and command line application bacwhoami.

* Added You-Are-Request encoding, decoding, unit tests, and command line application bacyouare.

* Added Who-Am-I with Who-Is and You-Are handling into the example server application when run as device 4194303.

src/bacnet/basic/service/h_whoami.h

@@ -0,0 +1,31 @@
+/**
+ * @file
+ * @brief Header file for a basic Who-Am-I-Request service handler
+ * @author Steve Karg
+ * @date June 2025
+ * @copyright SPDX-License-Identifier: MIT
+ */
+#ifndef HANDLER_WHO_AM_I_H
+#define HANDLER_WHO_AM_I_H
+
+#include <stddef.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <stdint.h>
+/* BACnet Stack defines - first */
+#include "bacnet/bacdef.h"
+/* BACnet Stack API */
+#include "bacnet/apdu.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+BACNET_STACK_EXPORT
+void handler_who_am_i_json_print(
+    uint8_t *service_request, uint16_t service_len, BACNET_ADDRESS *src);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+#endif