Mimic the Python SDK response.output_text property

[mergesort]

Hey @jamesrochabrun, thanks for the amazing library and the quick updates! I was just messing around with 4.0.5, and tried to replace my current usage of chat completions in a tool with the new responses API.

I noticed that the official OpenAI client has added a handy output_text property for doing what people do very often for the simplest of requests, deriving the text from a response.

This code from their Quickstart guide shows how they model this property.

from openai import OpenAI
client = OpenAI()

response = client.responses.create(
    model="gpt-4o",
    input="Write a one-sentence bedtime story about a unicorn."
)

print(response.output_text)

I think responseText would be a great computed property to have on ResponseModel, to easily provide that info for tools like mine, which ask ChatGPT for a simple text-based response.

Thanks again, I'm also using your SwiftAnthropic library in the same tool and your work is truly excellent — such a treat from the open source world!

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P.S. I didn't want to file a separate issue for this but you have a stray ) in your 4.0.5 release notes.

[jamesrochabrun]

no problem, updated https://github.com/jamesrochabrun/SwiftOpenAI/releases/tag/v4.0.6
(stream not supported yet, will find time this week for that)