fix(registry): use type-only imports (fixes TS1484 in stock Vite react-ts apps) - #993

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/cache@v3, actions/setup-node@v3, pnpm/action-setup@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

React Hook useEffect has a complex expression in the dependency array. Extract it to a separate variable so it can be statically checked