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.

test/bacnet/youare/CMakeLists.txt

@@ -0,0 +1,46 @@
+# SPDX-License-Identifier: MIT
+
+cmake_minimum_required(VERSION 3.10 FATAL_ERROR)
+
+get_filename_component(basename ${CMAKE_CURRENT_SOURCE_DIR} NAME)
+project(test_${basename}
+    VERSION 1.0.0
+    LANGUAGES C)
+
+
+string(REGEX REPLACE
+    "/test/bacnet/[a-zA-Z_/-]*$"
+    "/src"
+    SRC_DIR
+    ${CMAKE_CURRENT_SOURCE_DIR})
+string(REGEX REPLACE
+    "/test/bacnet/[a-zA-Z_/-]*$"
+    "/test"
+    TST_DIR
+    ${CMAKE_CURRENT_SOURCE_DIR})
+set(ZTST_DIR "${TST_DIR}/ztest/src")
+
+add_compile_definitions(
+    BIG_ENDIAN=0
+    CONFIG_ZTEST=1
+    )
+
+include_directories(
+    ${SRC_DIR}
+    ${TST_DIR}/ztest/include
+    )
+
+add_executable(${PROJECT_NAME}
+    # File(s) under test
+    ${SRC_DIR}/bacnet/youare.c
+    # Support files and stubs (pathname alphabetical)
+    ${SRC_DIR}/bacnet/bacdcode.c
+    ${SRC_DIR}/bacnet/bacint.c
+    ${SRC_DIR}/bacnet/bacreal.c
+    ${SRC_DIR}/bacnet/bacstr.c
+    ${SRC_DIR}/bacnet/basic/sys/bigend.c
+    # Test and test library files
+    ./src/main.c
+    ${ZTST_DIR}/ztest_mock.c
+    ${ZTST_DIR}/ztest.c
+    )