Add chat and hud notification config

src/main/java/com/gmail/nossr50/config/hocon/Items.java → src/main/java/com/gmail/nossr50/config/hocon/notifications/ConfigNotifications.java

@@ -1,7 +1,7 @@
-package com.gmail.nossr50.config.hocon;
+package com.gmail.nossr50.config.hocon.notifications;
 
 import ninja.leaping.configurate.objectmapping.serialize.ConfigSerializable;
 
 @ConfigSerializable
-public class Items {
+public class ConfigNotifications {
 }