feat: update eth_getUserOperationByHash response for pending status

[avasisht23]

Pull Request Checklist

• Did you add new tests and confirm existing tests pass? (yarn test)
• Did you update relevant docs? (docs are found in the site folder, and guidelines for updating/adding docs can be found in the contribution guide)
• Do your commits follow the Conventional Commits standard?
• Does your PR title also follow the Conventional Commits standard?
• If you have a breaking change, is it correctly reflected in your commit message? (e.g. feat!: breaking change)
• Did you run lint (yarn lint:check) and fix any issues? (yarn lint:write)
• Did you follow the contribution guidelines?

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PR-Codex overview

This PR focuses on updating the UserOperationReceipt interface in the types.ts file.

Detailed summary

• Updated blockNumber property to accept null if the user operation is pending.
• Updated blockHash property to accept null if the user operation is pending.
• Updated transactionHash property to accept null if the user operation is pending.

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[avasisht23]

Per: https://github.com/eth-infinitism/account-abstraction/pull/382/files

[denniswon]

should we update the doc for eth_getUserOperationByHash as well?

[avasisht23]

should we update the doc for eth_getUserOperationByHash as well?

@denniswon there's no doc that goes to this level of granularity on the type (see the method doc).

Ava/Sahil are working getting types in and I'll let them know accordingly.

[denniswon]

is this pr good to merge ? @avasisht23 @moldy530

[avasisht23]

unsure if this is necessary anymore, closing