feat(vocab): add IssuingSoftware and SoftwareVendor to UNTP core ontology
This MR adds RDFS/OWL definitions to the UNTP core ontology to back the schema (!756 (merged)) and context additions (!757 (merged)) for issuingSoftware.
This MR adds RDFS/OWL definitions to the UNTP core ontology to back the schema (!756 (merged)) and context additions (!757 (merged)) for issuingSoftware.