Add a way to display stacktrace of StacklessRuntimeException for debug

src/main/java/carpet/script/exception/StacklessRuntimeException.java

@@ -1,5 +1,7 @@
 package carpet.script.exception;
 
+import carpet.script.external.Carpet;
+
 /**
  * A type of {@link RuntimeException} that doesn't spend time producing and filling a stacktrace
  */
@@ -18,6 +20,10 @@ public abstract class StacklessRuntimeException extends RuntimeException
     @Override
     public Throwable fillInStackTrace()
     {
+        if (Carpet.isDebugEnabled())
+        {
+            return super.fillInStackTrace();
+        }
         return this;
     }
 }