Add fromReadableStream or similar to the ResponseStream class

[MarkMurphy]

Confirm this is a feature request for the Node library and not the underlying OpenAI API.

• This is a feature request for the Node library

Describe the feature or improvement you're requesting

Both the ChatCompletionStream and AssistantStream classes have a fromReadableStream method that the new ResponseStream class is missing.

I'm looking for something similar to allow my client side web application to request a response stream from my server and convert that to a ResponseStream instance.

For example:

const sendMessage = async (input) => {
    controller.current = new AbortController();
    const response = await fetch(`${API_URL}/responses`, {
      method: "POST",
      headers: {
        "Content-Type": "application/json",
      },
      body: JSON.stringify({
        input,
      }),
      signal: controller.current.signal,
    })
    const stream = ResponseStream.fromReadableStream(response.body)
    handleReadableStream(stream)
  };

Also open to alternative recommendations if this is not the pattern to use moving forward. There is currently a lack of guidance in the docs on how to integrate with the new responses API when it comes to frontend applications.

Additional context

No response