Beejones/presentation exchange

[beejones]

Problem: The SDK needs to support the presentation exchange protocol

Solution: Add the presentation exchange protocol to Requestor

Validation: New unit tests

Type of change:

• [x] Feature work
• [ ] Bug fix
• [ ] Documentation
• [ ] Engineering change
• [ ] Test
• [ ] Logging/Telemetry

Risk:

• [x] High – Errors could cause MAJOR regression of many scenarios. (Example: new large features or high level infrastructure changes)
• [ ] Medium – Errors could cause regression of 1 or more scenarios. (Example: somewhat complex bug fixes, small new features)
• [ ] Small – No issues are expected. (Example: Very small bug fixes, string changes, or configuration settings changes)

Work Item links: https://identitydivision.visualstudio.com/Engineering/_workitems/edit/1059130

Documentation Links: https://identity.foundation/presentation-exchange