Feature Request: Add a roles command.

[MEhrn00]

Many users often ask about the roles in the server. The common roles can be applied by reacting in the #roles channel; however, there are a few specialized roles such as Veteran, CTF Creators, CTF Developers, etc. There is currently know public documentation on how to acquire these roles.

Adding a $roles command which will give an overview on how to acquire each common specialized role and how to get the more general roles would be useful information to new members of the server.