Responses Background

[iamemilio]

🚀 Describe the new functionality needed

The background parameter is an optional bool that Open AI uses to run long-running, resource-intensive requests asynchronously.

Requirements:

• Add background to create requests, and the response object
• For now, just drop this field. It just needs to exist to prevent 404s.

💡 Why is this needed? What if we don't build it?

feature parity

Other thoughts

good first issue