This change is a temporary feature in response to the ShaclORClassEditor
that was introduced to shacl-vue in d1b8a8c445a394119cc4a520fccc7b8c560fdb51.
The ShaclORClassEditor specifically matches propertyShapes that have sh:or and
where all elements in the sh:or array have an sh:class key. This makes it simple
to assume that the corresponding value would be a namedNode, which is also what
getPropertyNodeKind has been updated to return.
This feature is not intended to fully support any sh:or scenario, only to have
parity with shacl-vue to the level that the latter supports sh:or.
Future changes should consider moving the determination of a property's nodekind
to shacl-vue itself, at the point where data is entered into the UI. This would
prevent the necessity of having to determine the nodeKind for what could be very
complicated recursive sh:or arrays with a variety of nodekinds.
