Sandra Parsick

Add support for branch rulesets

8

Supersede #3188 - fix merge conflicts - resolve code review issues from #3188

- updated test to junit5 - delete dead code

### I confirm: - [x] I have read the [Hugo Clarity theme documentation](https://github.com/chipzoller/hugo-clarity/blob/master/README.md). - [x] I have reviewed [other issues in this repository](https://github.com/chipzoller/hugo-clarity/issues), and this feature has not already been...

- in three cases, there are still junit3 reference because they are part of a test.