fix(ui-demo-app): fix the package json to include latest ak pkgs

[moldy530]

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

The focus of this PR is to update dependencies, add authorization headers to API requests, and introduce a new package for environment variables.

Detailed summary

• Added authorization headers to API requests in route.ts
• Updated zod dependency to version 3.23.8
• Updated @account-kit/core, @account-kit/infra, and @account-kit/react dependencies to version 4.0.0-alpha.4
• Added new dependencies: @t3-oss/env-core, @t3-oss/env-nextjs, @tanstack/react-query
• Updated zod dependency in package.json to version 3.0.0

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Name	Status	Preview	Comments	Updated (UTC)
aa-sdk-site	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jul 10, 2024 6:30pm
aa-sdk-ui-demo	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jul 10, 2024 6:30pm