implement headless on all supported versions

core/src/main/java/com/volmit/iris/core/nms/INMSBinding.java

@@ -122,9 +122,7 @@ public interface INMSBinding {
         return 441;
     }
 
-    default IRegionStorage createRegionStorage(Engine engine) {
-        return null;
-    }
+    IRegionStorage createRegionStorage(Engine engine);
 
     KList<String> getStructureKeys();
 }

core/src/main/java/com/volmit/iris/core/nms/v1X/NMSBinding1X.java

@@ -21,6 +21,7 @@ package com.volmit.iris.core.nms.v1X;
 import com.volmit.iris.Iris;
 import com.volmit.iris.core.nms.INMSBinding;
 import com.volmit.iris.core.nms.container.BiomeColor;
+import com.volmit.iris.core.nms.headless.IRegionStorage;
 import com.volmit.iris.engine.framework.Engine;
 import com.volmit.iris.util.collection.KList;
 import com.volmit.iris.util.collection.KMap;
@@ -109,6 +110,11 @@ public class NMSBinding1X implements INMSBinding {
         return Color.GREEN;
     }
 
+    @Override
+    public IRegionStorage createRegionStorage(Engine engine) {
+        return null;
+    }
+
     @Override
     public KList<String> getStructureKeys() {
         var list = StreamSupport.stream(Registry.STRUCTURE.spliterator(), false)