add model copy operation

[balhoff]

This will support https://github.com/geneontology/noctua/issues/606.

• Extend batch API with a COPY operation
  • Possibly also expose as an additional REST endpoint (requested by @tmushayahama)
• Perform copy:
  • Create new model
  • Copy all axioms from copied model to new model
  • Remove evidence from all edges
  • Replace contributor and provider on model and all nodes and edges with the user performing the operation
  • Add annotation assertion to new model node: <NEW_MODEL_IRI> prov:wasDerivedFrom <OLD_MODEL_IRI>

[tmushayahama]

Thanks @balhoff . On a parallel @vanaukenk do you have a workflow in mind from the Noctua Form and Landing Page how this will work?

[vanaukenk]

Closing this as the first pass on shallow model copy is done.