Implement missing data types for calendar and schedule (#474)

* Added the SpecialEvent struct for the Exception_Schedule property of Schedule, encode/decode/same functions, unit tests, and integrated into bacapp functions.

* Added the CalendarEntry struct for the Date_List property of Calendar and the SpecialEvent struct, encode/decode functions, unit tests, and integrated into bacapp functions.

* Added the DateRange struct for the Effective_Period property of Schedule, encode/decode functions, unit tests, and integrated into bacapp functions.

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Co-authored-by: Steve Karg <skarg@users.sourceforge.net>

test/bacnet/basic/object/credential_data_input/CMakeLists.txt

@@ -57,6 +57,8 @@ add_executable(${PROJECT_NAME}
 	${SRC_DIR}/bacnet/weeklyschedule.c
 	${SRC_DIR}/bacnet/bactimevalue.c
 	${SRC_DIR}/bacnet/dailyschedule.c
+	${SRC_DIR}/bacnet/calendar_entry.c
+	${SRC_DIR}/bacnet/special_event.c
     # Test and test library files
 	./src/main.c
 	${ZTST_DIR}/ztest_mock.c