agent: Add reactions at the response level (#27958)

Release Notes:

- Added the user reaction (👍 or 👎) to each agent response.
- 👎 will trigger a comment box linked to the response

---------

Co-authored-by: Danilo Leal <daniloleal09@gmail.com>
Co-authored-by: Agus Zubiaga <hi@aguz.me>
342134fbabThomas Mickley-Doyle committed on 4/9/2025, 5:21:07 PM· committed by GitHubparentb47aa33
3 files changedLine totals unavailable