feat(openAI): Add File storage interaction

[bso-AL]

Description

First of all thanks for this Package, TJ. I needed some extra functionality for a personal project, but thought maybe more people could make use of it - if you believe this fits within Prism's scope.

This PR adds the functionality of interacting with OpenAI's file storage. It implements the functionality of uploading a file, listing all files in your storage, deleting a file, retrieving a file's information and retrieving a file's content.

I've tried to mimic the current structure as best as possible, but I was a little stumped with regards to making a ResponseBuilder as I see the other "types" have. I ended up making it into a provider specific concern that formats the Responses.

I've tried to keep the Responses as generic as possible in order to future proof if other people want to implement the File storage interaction with other Providers other than OpenAI.

[sixlive]

Since this is very specific to OpenAI, what if we use use it as Prism::provider('openai')->uploadFile() etc..

[bso-AL]

Since this is very specific to OpenAI, what if we use use it as Prism::provider('openai')->uploadFile() etc..

I think that Anthropic, Mistral and Gemini - possibly xAI as well? - all offer file storage interactions as well, so my thinking was keeping it as generic as possible, in case someone wants to add it to the Mistral provider the functionality is already there and they just have to add the handler/methods to the Mistral Provider.

That being said I have no issue with making this OpenAI specific if that is acceptable for the Prism package? It was how I had initially written it in my personal project, so should be a quick rewrite :)

[khalidmaquilang]

@bso-AL Thanks for this.. I am going to use this for now until there is a new update

[sixlive]

Going to give this another set of eyes here shortly

[sixlive]

I've thought a lot about this and I think I'm going to pass on this for now. I may reconsider in the future but for now I feel likes its out of scope... for now