implement the Interim Guidance using interoperability standards

[Akshitapalliwal]

IG to include how to implement the Interim Guidance using interoperability standards. For example, there is no mention related to the HL7 SMART Healthcard. Additional detail and a high-level summary of how and where existing and proposed HL7 standards are being leveraged, including relevant HL7 FHIR IGs and the HL7 SMART Healthcard