Adding Astar to list of chains

[tbinnie]

As the Astar chain is becoming more and more popular it would be great if Wagmi supported it in its chain list. I have its info as below and am adding it manually but would like to request it's importable to make it easier for other developers.

export const astar = { id: 592, name: "Astar", network: "astar", nativeCurrency: { decimals: 18, name: "Astar", symbol: "ASTR", }, rpcUrls: { public: { http: ["https://rpc.astar.network:8545"] }, default: { http: ["https://rpc.astar.network:8545"] }, }, blockExplorers: { etherscan: { name: "subscan", url: "https://astar.subscan.io" }, default: { name: "subscan", url: "https://astar.subscan.io" }, }, contracts: { multicall3: { address: "0xca11bde05977b3631167028862be2a173976ca11", blockCreated: 761794, }, }, } as const satisfies Chain;