added encode_nbt, added 'nbt' and 'nbt_merge' to modify entity API.

src/main/java/carpet/script/value/LazyListValue.java

@@ -1,6 +1,8 @@
 package carpet.script.value;
 
 import carpet.script.exception.InternalExpressionException;
+import net.minecraft.nbt.StringTag;
+import net.minecraft.nbt.Tag;
 
 import java.util.ArrayList;
 import java.util.Iterator;
@@ -152,4 +154,11 @@ public abstract class LazyListValue extends AbstractListValue implements Iterato
     {
         return ("i"+getString()).hashCode();
     }
+
+    @Override
+    public Tag toTag(boolean force)
+    {
+        if (!force) throw new NBTSerializableValue.IncompatibleTypeException(this);
+        return StringTag.of(getString());
+    }
 }