Create Guide for RDFS/SKOS modelling in DPV

[coolharsh55]

The guide for using DPV with RDFS/SKOS will provide guidance, considerations, and best practices for using DPV with RDFS/SKOS modelling. The guide will explain how RDFS enables creating a simple ontological models (concepts and properties) and how SKOS enables taxonomies/thesauri of concepts. The guide will also explain how this model suits use-cases which require referencing concepts directly (e.g. we use Consent) instead of or alongside instantiation (e.g. x is an instance of Consent) which is how OWL2 is expected to be used.