Expire old versions based on rules

## No documentation or setting UI about Version Control available now
I see old versions of files in the web client, but don't know how to delete them, or will them be deleted automatically somewhen in the future? Nothing about version control is mentioned in the documentation.

## Describe the solution you'd like
Add setting options and associated documentation.

## Describe alternatives you've considered
(empty)

## Additional context
(empty)