Add HyperEVM mainnet to chains

[Thektonic]

Currently HyperEVM isn't available on the chain package

[hzhu]

There have been several PRs attempting to add HyperEVM mainnet that were closed because the 999 chain ID is already used by another chain. The recommendation is to define your own chain using defineChain:

export const hyperEVM = defineChain({
  name: "HyperEVM",
  id: 999,
  sourceId: 999,
  nativeCurrency: { name: "HyperEVM", symbol: "HYPE", decimals: 18 },
  rpcUrls: {
    default: {
      http: ["https://rpc.hyperliquid.xyz/evm"],
      webSocket: ["wss://rpc.hyperliquid.xyz/evm"],
    },
  },
  blockExplorers: {
    default: {
      name: "HyperEVMScan",
      url: "https://hyperevmscan.io/",
      apiUrl: "https://api.hyperevmscan.io/api",
    },
  },
  contracts: {
    multicall3: {
      address: "0xcA11bde05977b3631167028862bE2a173976CA11",
      blockCreated: 13051,
    },
  },
});