Refactor rem units

[gnomeontherun]

New rem units formatting for easier customization down the road.

[adibwoy]

I think this wasn't assigned to 1.0. We moved it to Someday. Updating the milestone.

[mathisscott]

Rem units have been added to the project a while back. Updates to what we are looking to improve can be found in #1721

[github-actions]

Hi there 👋, this is an automated message. To help Clarity keep track of discussions, we automatically lock closed issues after 14 days. Please look for another open issue or open a new issue with updated details and reference this one as necessary.