[feat] Provide API for verification of immutable contracts in Sourcify

[e00dan]

Is your feature request related to a problem? Please describe.

This is a feature request. Here's explanation of immutable contracts: https://docs.sourcify.dev/docs/immutables/. It would be great if Godwoken integrated verification of immutable contracts via https://sourcify.dev.

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Demo repository: https://github.com/Kuzirashi/immutable-proxy-demo

Example contracts on Godwoken Testnet:
LendingPool implementation: 0xfD373C524601F405b4403fDA0CBd947C9c82Af3F (verified on Sourcify 👍 )
LendingPoolAddressesProvider: 0xeAC53aC47Fd20500AAd301a6f8071d2e2E5aD917 (verified on Sourcify 👍 )

Lending pool PROXY address: 0xb34030df3686f08603792443696A2675a0dACF21 (can't verify on Sourcify 🔴 )

[RetricSu]

hi, I have some questions:

1. from the docs

It will then try to find the tx that created the contract by scraping the blockexplorer pattern given in sourcify-chains.ts.

why sourcify can't get the creation tx hash from our godwoken explorer?

2. If I understand correctly, the feature request on godwoken-web3 will be something like:

{
    "jsonrpc": "2.0",
    "method": "poly_getContractCreationTxHash",
    "params": [
        "0xcf5dccb5ceaddaeebf36affd16d5a4bd1ffa5193" // contract address
    ],
    "id": 1
}
{
 "0x....." // tx hash
}

am I correct?

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from my point of view, I think it will be better to fetch this kind of data from godwoken explore instead of godwoken-web3