Fix nms environments for nether and end

src/main/java/com/volmit/iris/nms/v16_2/NMSBinding16_2.java

@@ -40,4 +40,9 @@ public class NMSBinding16_2 implements INMSBinding
 		baseBiomeCache.put(biome, v);
 		return v;
 	}
+
+	@Override
+	public boolean isBukkit() {
+		return false;
+	}
 }

src/main/java/com/volmit/iris/nms/v16_3/NMSBinding16_3.java

@@ -39,4 +39,9 @@ public class NMSBinding16_3 implements INMSBinding
 		baseBiomeCache.put(biome, v);
 		return v;
 	}
+
+	@Override
+	public boolean isBukkit() {
+		return false;
+	}
 }

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

@@ -25,4 +25,9 @@ public class NMSBinding1X implements INMSBinding
 	public Object getBiomeBase(Object registry, Biome biome) {
 		return null;
 	}
+
+	@Override
+	public boolean isBukkit() {
+		return true;
+	}
 }

src/main/java/com/volmit/iris/util/RegistryListStructurePiece.java

@@ -1,14 +1,14 @@
 package com.volmit.iris.util;
 
-import static java.lang.annotation.ElementType.*;
-import static java.lang.annotation.RetentionPolicy.*;
-
 import java.lang.annotation.Retention;
 import java.lang.annotation.Target;
 
+import static java.lang.annotation.ElementType.*;
+import static java.lang.annotation.RetentionPolicy.RUNTIME;
+
 @Retention(RUNTIME)
 @Target({PARAMETER, TYPE, FIELD})
-public @interface RegistryListStructure
+public @interface RegistryListStructurePiece
 {
 
 }