feat: P-431 add karat dao user vc

[higherordertech]

Context

As title, a new platform VC is added, currently for Karat Dao. It's validating against karat dao API, for evm address only.

Labels

Please apply following PR-related labels when appropriate:

• C0-breaking: if your change could break the existing client, e.g. API change, critical logic change
• C1-noteworthy: if your change is non-breaking, but is still worth noticing for the client, e.g. reference code improvement

How (Optional)

Testing Evidences

Please attach any relevant evidences if applicable

{
  "@context": [
    "https://www.w3.org/2018/credentials/v1",
    "https://w3id.org/security/suites/ed25519-2020/v1"
  ],
  "id": "0x16cadb0270025ebd1058c7fd6a16c183a694d0ddae1c7cf298284e46d1461831",
  "type": [
    "VerifiableCredential"
  ],
  "credentialSubject": {
    "id": "did:litentry:substrate:0xd4e35b16ec6b417386b948e7eaf5cc642a243096cecf366e6313689b90969f42",
    "description": "You are a user of a certain platform",
    "type": "Platform user",
    "assertionText": "PlatformUser(KaratDaoUser)",
    "assertions": [
      {
        "and": [
          {
            "src": "$platform",
            "op": "==",
            "dst": "KaratDao"
          }
        ]
      }
    ],
    "values": [
      true
    ],
    "endpoint": "wss://rpc.rococo-parachain.litentry.io"
  },
  "issuer": {
    "id": "did:litentry:substrate:0xa6b164542e2771f011aba027ced324bee5e688582294374cff3d55780ff8ebd7",
    "name": "Litentry TEE Worker",
    "mrenclave": "3BHA28ASJVYD2FTpcT7d8NXpYBw8tbGGCbcGdZv9t6Wk"
  },
  "issuanceDate": "2024-02-06T09:23:52.966157001+00:00",
  "parachainBlockNumber": 2408,
  "sidechainBlockNumber": 4880,
  "proof": {
    "created": "2024-02-06T09:23:52.967035267+00:00",
    "type": "Ed25519Signature2020",
    "proofPurpose": "assertionMethod",
    "proofValue": "6967d6248ff8da60b1a5edfa52c7416a5d4f8bfa3044e8d294452959ccba2e9fe8c54ed9e8db1b745f634fdcac608aced46db61b2ddbed2eab1e538793f90908",
    "verificationMethod": "0xa6b164542e2771f011aba027ced324bee5e688582294374cff3d55780ff8ebd7"
  }
}

[linear]

P-431 Karat Dao user credential

[BillyWooo]

very nice. Thank you.