Retrieve chain definitions

curl --request GET \
  --url https://api.herodotus.cloud/chain-definitions

{
  "definitions": {
    "1": "Ethereum Mainnet",
    "300": "zkSync Era Sepolia",
    "4801": "World Chain Sepolia",
    "84532": "Base Sepolia",
    "421614": "Arbitrum Sepolia",
    "11155111": "Ethereum Sepolia",
    "11155420": "Optimism Sepolia",
    "STARKNET": "Starknet Mainnet",
    "SN_SEPOLIA": "Starknet Sepolia"
  }
}