List token standards

{
  "data": [
    {
      "standard": "QRC-20",
      "type": "fungible",
      "description": "Quantum Chain fungible token standard.",
      "supportedOperations": ["deploy", "mint", "burn", "transfer", "pause", "unpause", "grantRole", "revokeRole"],
      "requiredFields": ["name", "symbol", "decimals"],
      "optionalFields": ["initialSupply", "supplyPolicy", "approvalPolicyId"],
      "financeUseCase": "Stablecoins, utility tokens, institutional balances.",
      "implementationStatus": "partially-implemented"
    },
    {
      "standard": "QRC-3643",
      "type": "permissioned",
      "description": "Identity- and compliance-aware regulated token.",
      "supportedOperations": ["deploy", "mint", "burn", "freeze", "unfreeze", "transfer", "updateCompliance"],
      "requiredFields": ["name", "symbol", "decimals", "complianceConfig"],
      "optionalFields": ["allowlist", "approvalPolicyId"],
      "financeUseCase": "Permissioned regulated assets with identity-aware transfers.",
      "implementationStatus": "proposed"
    }
  ],
  "pagination": { "total": 7, "limit": 50, "offset": 0 }
}