refactored all the @require{role} commands into a single command

[theunkn0wn1]

I found it somewhat wasteful to have different @require decorators for each permission level, eg @require_rat ,@require_techrat, and for some reason @require_recruit. Half the decorators arn't even in use! All the decorators share the same base code, the only difference is a hardcoded constant int. What ive done is replaced all the old decorators with a single require_permission decorator.

its signature is as follows:

def require_permission(privilage:Permissions, message =''):
   pass

and comes with an enum Permissions.

[theunkn0wn1]

Oh.. and this depends on #240