chore: move upstream package changes to separate PR

The non-headless react-* package changes (react-avatar, react-breadcrumb,
react-button, react-field, react-progress, react-rating, react-skeleton,
react-slider, react-spinner, react-switch, react-textarea) have been moved
to a dedicated PR to keep this PR focused on the react-headless package.

This PR now depends on those upstream changes being merged first.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: dmytrokirpa