Feature/oscbs 29 calendar time object (#440)

* Added basic Calendar object, unit tests, and integration with example device object.

* Added basic Time Value object, unit tests, and integration with example device object.

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

zephyr/subsys/object/CMakeLists.txt

@@ -27,6 +27,7 @@ if(CONFIG_BACNET_USE_DYNAMIC_DESCRIPTION)
     bi.c
     bo.c
     bv.c
+    calendar.c
     channel.c
     command.c
     credential_data_input.c
@@ -42,6 +43,7 @@ if(CONFIG_BACNET_USE_DYNAMIC_DESCRIPTION)
     osv.c
     piv.c
     schedule.c
+    time_value.c
     trendlog.c
     )