Deleted Vulnerability files
Revert to state before renaming Vulnerability
Deleted initial Vulnerability files
Added toString functions to Layer and Rootcause entities
Added two new form extensions for the form and entity types.  Changed fixture for product entity. Updated Vulnerability entity with nullable many-to-one relationships. Updated Classification Type and Refactored Vulnerability Type options to Extensions Added translation for classification in messages.yml. Included new widget in fields.html.twig and enhanced the New Vulnerability template as a foundation for other templates.