Support file uploads

[nooone]

I am unable to figure out how to upload a file to use it with a vector store and an assistant.
I have implemented this with "Simple OpenAI" (community library) before, so I do understand the API in general.
However I am unable to figure out how to actually upload the bytes.

OpenAIClient.files() is missing a create method.
OpenAIClient.beta().vectorStore().files() has a create method, but it expects an existing File-ID.
OpenAIClient.upload() has a create method, but it ultimately requires OpenAIClient.upload().parts() to complete and OpenAIClient.upload().parts() seems to be completely empty without any methods at all.

Is uploading files even supported? If so, can you add an example to the documentation? If not, can you add a list of features that this library does currently not support instead?

[TomerAberbach]

File uploads and downloads are currently not supported, but we will be tackling that ~soon. I think the only endpoints we are missing are ones related to uploads/downloads.