Discuss moving formatter from file module

Problem/Motivation

Follow up from ✨ Remove hardcoded restriction of filesize formatter to fields named "filesize" Needs review from @benjifisher

I see some discussion of moving the formatter out of the file module. Perhaps it makes sense to do that in a follow-up issue that also makes the formatter more configurable.

Steps to reproduce

NA

Proposed resolution

TBD - need to agree if it's something to be done

Remaining tasks

Agree on moving
Implement
Review

User interface changes

NA

API changes

Formatter is moved from file module

Data model changes

NA

Release notes snippet

NA