fix: member role inside of given repository checks

[gentlementlegen]

Resolves #114
QA: Meniole#52 (comment) (ubiquibot is an outside collaborator with write permissions)

[0x4007]

@gentlementlegen will you be able to prioritize this？

[gentlementlegen]

@0x4007 Yes waiting on your input about #114 (comment)

[whilefoo]

I'm fine with the changes, my only concern is that we will have to declare max concurrent tasks for every permission (write, read, ...) and it might be confusing

[gentlementlegen]

@whilefoo maybe we could simplify to just collaborator and contributor, and then map a group of roles to these two? Admin would just have no limits. I can do that in a secondary pull-request. @0x4007 rfc

[0x4007]

That sounds like a good plan.