Support JsonPatch as the OpenAI SDK does

[sheng-jie]

Recently, I noticed that OpenAI's repository has merged a new PR: openai/openai-dotnet#736. This merge effectively resolves issues like #5862 and #6208. We look forward to official support as soon as possible. Thanks a lot.

[stephentoub]

You already have complete access to everything the underlying sdk's object CT model supports, via RawRepresentation, which gives you the original objects back, and RawRepresentationFactory, which let's you supply the underlying sdk's options for the request. When the OpenAI library's JsonPath APIs are available, they'll as such be immediately usable when using it via Microsoft.Extwnsions.AI.

What else are you hoping for?

[sheng-jie]

Ok, I got it, thanks. You mean to use ChatOptions.RawRepresentationFactory to implement this feature. I'll give it a try once the OpenAI library is released and then see if MEAI needs any additional features.

[stephentoub]

For setting custom input options, yes. We will also look at whether it makes sense to propagate ChatOptions.AdditionalOptions via the json path support.