[Policy] Trust Marks examples

[peppelinux]

Example of Trust Mark establishing grants for the interaction with under age users, status lists also introduced to facilitate offline revocation checks (see #37 )

{
  "typ": "trust-mark+jwt",
  "alg": "ES256",
  "kid": "2HnoFS3YnC9tjiCaivhWnXAdNuA",

  // optionals chains like federation and or x5c
  "trust_chain": [
    $TA-EntityConfiguration,
    $TA-SubordinateStatement-about-TMIssuer,
    $TMIssuer-EntityConfiguration
  ]
}
.
{
  "id": "https://openid.net/trust_marks/rp/under-age",
  "iss": "https://trust-issuer.example.org",
  "sub": "https://relying-party.example.com",
  "iat": 1579621160,
  "exp": 1579707560,
  "ref": "https://openid.net/trust_marks/rp/under-age/v1.0",
  "status": {
    "federation_trust_mark_status_endpoint": "https://trust-issuer.example.org/status/rp/under-age",
    "status_list": {
      "idx": 0,
      "uri": "https://trust-issuer.example.org/statuslists/1"
    }
  },
  "policy_uri": "https://openid.net/trust_marks/rp/under-age/policy",
  "tos_uri": "https://openid.net/trust_marks/rp/under-age/terms"
}

There might be several others like:

https://openid.net/trust_marks/rp/disable-user
https://openid.net/trust_marks/rp/health-service

// main Trust Mark ID per Open Banking
https://trust-registry.openbankingfoundation.org/trust_marks/v1

// Trust Mark ID specific roles
https://trust-registry.openbankingfoundation.org/trust_marks/aisp/v1 // AISP
https://trust-registry.openbankingfoundation.org/trust_marks/pisp/v1 // PISP
https://trust-registry.openbankingfoundation.org/trust_marks/aspsp/v1 // ASPSP
https://trust-registry.openbankingfoundation.org/trust_marks/cbpii/v1 // CBPII

// Trust Mark ID principale per Healthcare
https://trust-registry.healthauthority.org/trust_marks/v1

// Trust Mark ID specifici per ruoli e servizi
https://trust-registry.healthauthority.org/trust_marks/hospital/v1 // Ospedali
https://trust-registry.healthauthority.org/trust_marks/pharmacy/v1 // Farmacie
https://trust-registry.healthauthority.org/trust_marks/laboratory/v1 // Laboratori
https://trust-registry.healthauthority.org/trust_marks/telemedicine/v1 // Telemedicina
https://trust-registry.healthauthority.org/trust_marks/ehr-provider/v1 // Provider EHR

// Trust Mark ID principali per settori
https://trust-registry.education.org/trust_marks/university/v1 // Università
https://trust-registry.education.org/trust_marks/research/v1 // Centri di Ricerca
https://trust-registry.education.org/trust_marks/training/v1 // Formazione Professionale

[selfissued]

We briefly discussed this on today's OpenID Connect WG call. What additional explanatory text do think should accompany them so that readers understand what's being illustrated by these examples?

Also, I assume that the $ text would be replaced with actual values in a corresponding PR?