Make explicit any implicit SAREF InverseOf statements? (saref-portal#11)

From saref-portal#11 (closed)

Includ inverse property for:

https://saref.etsi.org/saref4inma/isCategoryOf INVERSEOF https://saref.etsi.org/saref4inma/belongsToCategory

https://saref.etsi.org/saref4inma/isCreatedIn INVERSEOF https://saref.etsi.org/saref4inma/creates

https://saref.etsi.org/saref4inma/isFeatureOfInterestOf INVERSEOF https://saref.etsi.org/saref4inma/hasFeatureOfInterest

https://saref.etsi.org/saref4inma/produces INVERSEOF https://saref.etsi.org/saref4inma/isProducedBy