Add a "message-prefix" that can be customized in lang.yml or conf

[Yhteys]

I've had this in mind for a while, but never had time to request it.
Message-prefix is a customizable String that goes in front of every message. Like this:
FactionsUUID -> You don't have permissions to do that!
ExampleServer -> Changed gamemode to "CREATIVE"

Example picture.
"Aikakausi » " is the prefix here:

[CmdrKittens]

Unfortunately this would not be easily doable because messages are pretty spread out in their current implementation. Long-term, this could be considered :)