Holder presentation

[dtsiflit]

Description of change

SD-JWT-VC feature. The ability to create a holder presentation. Usage examples can be found here:

// obtain/create an issuer signed sd-jwt
let query: Set<JSONPointer> = Set(
  ["/address/region", "/address/country", "/test_recursive/recursive_address"]
    .compactMap {
      JSONPointer(pointer: $0)
    }
)
    
let presentedSdJwt = try await issuerSignedSDJWT.present(
  query: query,
  visitor: visitor
)

The solution makes use of JSON pointers.

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the readme
• My changes generate no new warnings
• I have added unit tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[dtsiflit]

Addresses #32