[WIP] Add v2 api compatibility and Batches api

[The-LoneWolf]

What:

• Bug Fix
• New Feature

Description:

I have applied v1 to v2 migrations of open ai, and also added batches api.

Todos :

• Update Readme.md
• Update tests to be compatible with v2 changes
• Add Bacthes tests

[gehrisandro]

Hi @The-LoneWolf

Thanks for the PR.

Is there a reason why you created another PR besides #395 ?
What is the difference?

[gehrisandro]

@The-LoneWolf FYI: I am currently extracting the Batch API from this PR.

[The-LoneWolf]

Hi @gehrisandro

No reason :D I only needed to make gpt4-o model to work in our agency projects so, I started working a few days before but then i came see there is another PR going on along with my work.

Do you think this week we can see another release with api v2 an batches api?

[gehrisandro]

@The-LoneWolf Batches API has been released: https://github.com/openai-php/client/releases/tag/v0.9.1

v2 API will take a couple more days.

I leave this PR open as a reference, until v2 is done.

Thanks for your help with the Batches API 🎉

[gehrisandro]

Support for the Assistants API v2 and the Vector Stores API as finally arrived (beta). 🚀

Happy to hear your feedback before making it a stable release.

https://github.com/openai-php/client/releases/tag/v0.10.0-beta.1