Add a "time in words" formatter for durations

What does this MR do and why?

Creates a new formatter for human-readable durations that uses the same scale as our "timeago" utilities.

It can be used as a way to format seconds into any amount of time.

Related to #350184 (closed)

#350184 (closed) progress	status
Update help popover icon (!83735 - merged)	workflowin review
Add a "time in words" formatter for durations (!83740 - merged)	👈 you are here
Adds status popover in runners table header (!83305 - merged)	workflowin dev

Screenshots or screen recordings

The implementation will be used at !83305 (merged).

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.