staff -> admins

* rename everything containing staff back to admin (as requested by ryan i've renamed commands like slconfig to saconfig but left "slconfig" as an alias)
* format almost every file correctly
* a few other improvements

src/main/java/me/totalfreedom/totalfreedommod/player/PlayerData.java

@@ -267,4 +267,4 @@ public class PlayerData
     {
         return displayDiscord;
     }
-}
+}