Ability to negate a wildcard when selecting branches to protect

Problem to solve

We currently support wildcards in protected branches. Customer would like to have the option to negate a protected branch regex. That is, be able to say something like 'protect all branches except feature/*'.

It may be even more powerful if we support full regex support. That is out of scope for this issue

Proposal

Add ability to negate a wildcard when selecting a set of branches to protexct. i.e. Protect all branches except feature/* .