Add support for stalk words -> role IDs to ping

[Universal-Omega]

I think adding a stalk words config option where you can add like the below:

[StalkWords]
!example = <role_id>

Which would ping the role on Discord if a user uses an IRC stalk word. Currently there is really no way to role ping over the relay but I think this could be a good way we could do it and it could work quite well. It also wouldn't be to hard to do.