bug: Incorrect pluralisation in created time output

[adityashekhawat1999]

Description

The "Created Time" output in Harbor CLI does not correctly handle pluralisation of time units.
For example:

• "2 hour ago" instead of "2 hours ago"
• "4 day ago" instead of "4 days ago"

Proposed Fix
Update the time formatting logic to conditionally pluralise time units (minute, hour, day) based on their value.