docs: added to useSmartAccountClient.mdx

[aashkrishnan]

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?
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PR-Codex overview

This PR updates the documentation for the useSmartAccountClient hook, enhancing clarity by adding links to relevant types and providing more detailed descriptions of functionality and parameters.

Detailed summary

• Changed the title from useSmartAccountClient to a linked title.
• Added a description of the Smart Account Client's functionality and behavior with different account types.
• Linked UseSmartAccountClientProps and UseSmartAccountClientResult to their definitions.
• Defined accountParams with a link to AccountConfig<TAccount>.

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[aashkrishnan]

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