language_models: Send a header indicating that the client supports xAI models (#38931)
This PR adds an `x-zed-client-supports-x-ai` header to the `GET /models`
request sent to Cloud to indicate that the client supports xAI models.
Release Notes:
- N/A
ee357e8987Marshall Bowers committed on 9/26/2025, 4:11:48 AM· committed by GitHubparent0891a71