[Feature Request]: `check`/`ck_ntp_sync`: check if current ntp status or system clock is synchronized

[aronchanisme]

Is there an existing issue for the feature request?

• I have checked the existing issues.

Feature Description

check if current ntp status or system clock is synchronized

usage: 
check/ck_ntp_sync.sh

example:
check/ck_ntp_sync.sh

output:
return 0: if synced
return 1:  otherwise

Feature Implementation

sync_status=timedatectl status | grep "NTP synchronized\|System clock synchronized" | awk '{print $NF}'

if yes, return 0; otherwise return 1

Additional information

No response