Add class NodaValidationHelper, for now for validating actor

descriptions

src/NodaUncertaintyHelper.php

@@ -7,7 +7,8 @@
 declare(strict_types = 1);
 
 /**
- * Contains static functions for getting IDs for noda entries by various means.
+ * Contains static functions for identifying uncertainty or blocking
+ * completely uncertain inputs for actors, times, and places.
  */
 final class NodaUncertaintyHelper {