feat: add openai responses api capability

[matthewmichel]

Updates ai and @ai-sdk/openai versions to support the new OpenAI Responses API.
Updates the default "small" and "large" models to use the Responses API.
Adds a new webSearchPreview tool call to demo the new OpenAI Web Search Preview tool.

[vercel]

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[socket-security]

New and updated dependencies detected. Learn more about Socket for GitHub ↗︎

Package	New capabilities	Transitives	Size	Publisher
npm/@ai-sdk/openai@1.2.0 ➜ 1.2.2	None	+6	5.83 MB	vercel-release-bot
npm/ai@4.1.50 ➜ 4.1.54	environment, network	+14	9.11 MB	chriswdmr, ijjk, matheuss, ...8 more

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[yamz8]

the timeline of this pr is the reason why open source is the future.

[athrael-soju]

Sort and sweet. Love it!

[matthewmichel]

@tobiasbueschel Changes made to not store messages on the OpenAI side. Open to any other suggestions/feedback.

[nileshtrivedi]

@tobiasbueschel @matthewmichel Any chance this could be merged soon? LiteLLM now provides ResponsesAPI endpoint for many LLMs, not just OpenAI, and this would be great to have in chat-sdk by default.

[nileshtrivedi]

Does it support content annotations such as file_citation returned by the file_search_call, as described in Responses API spec?