Add doxygen documentation for oc_obt.h header file
The following APIs need doxygen style documentation added:
- oc_obt.h file itself
- oc_obt_discovery_cb_t
- oc_obt_device_status_cb_t
- oc_obt_status_cb_t
- oc_obt_init
- oc_obt_shutdown
- oc_obt_discover_unowned_devices
- oc_obt_discover_unowned_devices_realm_local_ipv6
- oc_obt_discover_unowned_devices_site_local_ipv6
- oc_obt_discover_owned_devices
- oc_obt_discover_owned_devices_realm_local_ipv6
- oc_obt_discover_owned_devices_site_local_ipv6
- oc_obt_discover_all_resources
- oc_obt_perform_just_works_otm
- oc_obt_request_random_pin
- oc_obt_perform_random_pin_otm
- oc_obt_perform_cert_otm
- oc_obt_device_hard_reset
- oc_obt_provision_pairwise_credentials
- oc_obt_provision_identity_certificate
- oc_obt_provision_role_certificate
- oc_obt_add_roleid
- oc_obt_free_roleid
- oc_obt_new_ace_for_subject
- oc_obt_new_ace_for_connection
- oc_obt_new_ace_for_role
- oc_obt_ace_new_resource
- oc_obt_ace_resource_set_href
- oc_obt_ace_resource_set_wc
- oc_obt_oc_obt_ace_add_permission
- oc_obt_provision_ace
- oc_obt_free_ace
- oc_obt_provision_role_wildcard_ace
- oc_obt_provision_auth_wildcard_ace
- oc_obt_retrieve_own_creds
- oc_obt_delete_own_cred_by_credid
- oc_obt_creds_cb_t
- oc_obt_retrieve_creds
- oc_obt_freecreds
- oc_obt_delete_cred_by_credid
- oc_obt_acl_cb_t
- oc_obt_retrieve_acl
- oc_obt_free_acl
- oc_obt_delete_ace_by_aceid