chore: address all v5 todos left in code

[jakehobbs]

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 the removal of deprecated decorators and actions related to multi-owner and single-owner accounts in the smart-accounts package, along with updates to documentation and code for improved clarity and functionality.

Detailed summary

• Deleted files related to multiOwner and singleOwner decorators.
• Updated JSDoc comments for clarity, removing TODOs.
• Refactored sendUserOperation calls in tests to use encode methods.
• Adjusted type definitions and documentation references for consistency.
• Removed unused exports for actions in the public interface.
• Cleaned up test cases related to multi-owner accounts.

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Project	Deployment	Actions	Updated (UTC)
aa-sdk-ui-demo	Error		Mar 9, 2026 4:41pm

[0xfourzerofour]

LGTM

[0xfourzerofour]

LGTM