`pull-request-branch-name` Max length & forbidden characters

Hello,

We have a pretty strict naming scheme for our branches (to ensure compatibility with other tools). In short, our branch names are limited in length, and can only contain specific characters.

There has been a request on the dependabot-core repo to expand the options in pull-request-branch-name to include these kinds of requirements, but it hasn't received much attention: https://github.com/dependabot/dependabot-core/issues/396.

Would dependabot-gitlab be interested in implementing these features (I guess as monkeypatches on top of the BranchNamer (https://github.com/dependabot/dependabot-core/blob/main/common/lib/dependabot/pull_request_creator/branch_namer.rb))? Or should we fork and maintain those ourselves?

I'm open for alternatives if you have any ideas!

Kind regards

Tom