language_models: Add support for using OpenAI Responses API through Zed provider (#46482)
This PR adds support for using the OpenAI Responses API through the Zed
provider.
This is gated behind the `open-ai-responses-api` feature flag.
Part of CLO-34.
Release Notes:
- N/A
451bf25d1cMarshall Bowers committed on 1/9/2026, 10:10:11 PM· committed by GitHubparent613183b