feat: expose useSendCalls hook through React Native package

[alecananian]

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)
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Fixes #2284

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PR-Codex overview

This PR focuses on adding new functionalities related to sending operations and managing email in the account-kit library for React Native and React.

Detailed summary

• Added a subproject commit identifier in docs-site.
• Introduced useSendCalls in account-kit/react-native/src/index.ts.
• Added useSendUserOperation, useSendVerificationCode, and useSetEmail to account-kit/react-native/src/index.ts.
• Exported useSendCalls, useSendUserOperation, useSendVerificationCode, and useSetEmail in account-kit/react/src/hooks/index.ts.

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Pull request overview

This PR exposes the useSendCalls hook through the React Native package by adding it to the package's public exports. The hook was already available in the base React package but was not accessible to React Native consumers.

Key Changes:

• Added useSendCalls hook export to the React Native package's public API

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
docs-site	Updated subproject commit reference for documentation
account-kit/react/src/hooks/index.ts	Added export statement for useSendCalls hook in the React hooks index
account-kit/react-native/src/index.ts	Re-exported useSendCalls hook in React Native package to make it publicly available