feat(v5): allow chainid override in SmartWalletClient

[adamegyed]

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)
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• Does your PR title also follow the Conventional Commits standard?
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PR-Codex overview

This PR introduces the OptionalChainId type, allowing the chainId property to be optional in various API calls. This change enhances flexibility and backward compatibility by enabling API consumers to omit the chainId if desired.

Detailed summary

• Renamed WithoutChainId<T> to OptionalChainId<T> in types.ts.
• Updated multiple API parameter types to use OptionalChainId.
• Modified API calls to support optional chainId, defaulting to toHex(client.chain.id) when not provided.
• Added tests for overriding chainId in prepareCalls, sendPreparedCalls, and grantPermissions.

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