Manage GitHub projects as well

I would be great if we could manage GitHub Projects as well.

Based on the configuration it could be like this:

Project Team:
  ...
  projects:
    roadmap:
      id: 1
      role: (admin | write | read)
    backlog:
      id: 2
      role: (admin | write | read)

Sadly the projects have an ID string with 1. Therefore, I would suggest using a name for better understanding. Otherwise it could lead to issues if you forget a comment:

Project Team:
  ...
  projects:
    1: (admin | write | read) # This is the roadmap
    2: (admin | write | read) # This is the backlog