Move ConfigHelper to new config module and deprecate it

libraries/config/src/main/java/de/oliver/fancylib/ConfigHelper.java

@@ -2,8 +2,10 @@ package de.oliver.fancylib;
 
 import org.bukkit.configuration.file.FileConfiguration;
 
+@Deprecated
 public class ConfigHelper {
 
+    @Deprecated
     public static Object getOrDefault(FileConfiguration config, String path, Object defaultVal) {
         if (!config.contains(path)) {
             config.set(path, defaultVal);