Improve usePresentationRequest example

[alegomes]

Is your feature request related to a problem? Please describe.

The example provided in the /wallet-api/wallet/{wallet}/exchange/usePresentationRequest endpoint is not instructive enough for a first-time user.

The did field is easy to guess. But, what about the presentationRequest, the selectedCredentials or the disclosures fields?

{
  "did": "string",
  "presentationRequest": "string",
  "selectedCredentials": [
    "string"
  ],
  "disclosures": {
    "additionalProp1": [
      "string"
    ],
    "additionalProp2": [
      "string"
    ],
    "additionalProp3": [
      "string"
    ]
  },
  "note": "string"
}

I think there is room for improvement. The way it is it's more a spec reference than an example.

Describe the solution you'd like

Suggestion based on the docs.

{
  // DID of user for signature generation
  "did": "did:xxx:xxxxx",
   // response from previous call to resolvePresentationRequest 
  "presentationRequest": "openid4vp://...",
   // List of credential id's to share
  "selectedCredentials": [
    "urn:uuid:0382f5fb...56db2d07683e"
  ],
  // Some explanation
  "disclosures": {
     "urn:uuid:9b2ea981-0501-4de2-b2f9-c886a6cbb143" : ["WyJiZ1I5OTdnRUVRNEU5bFpXNEhwVjRRPT0iLCJuYW1lIiwiSkZGIHggdmMtZWR1IFBsdWdGZXN0IDMgSW50ZXJvcGVyYWJpbGl0eSJd"]
  },
  "note": "a note for what?"
}