Add schema.org Sage datasets

[cconrad8]

Following a review from Sage data modeling group, the following elements from schema.org are recommended to be included for datasets

• = required

name *
description *
alternateName
includedInDataCatalog *
keywords *
measurementTechnique - get from assay across projects - having a controlled vocab could be helpful
dateModified
dateCreated
creator
funding
isPartOf - use to denote a DCC is part of (“NF Data Portal”)
conditionsOfAccess
citation

To do: create json schema to bind to synapse items and include these terms and enums as needed