Issue with Swift on Linux

[dfperry5]

Problem

When trying to use this package to build a lambda using the swift-aws-lambda runtime approach, there is a step where you need to build the executable using docker. When exciting this command:

docker run \                                                              ─╯
    --rm \
    --volume "$(pwd)/:/src" \
    --workdir "/src/" \
    swift:5.7.0-amazonlinux2 \
    swift build --product OpenAIPoc -c release -Xswiftc -static-stdlib

I'm seeing the below issue:

/src/.build/checkouts/OpenAISwift/Sources/OpenAISwift/OpenAISwift.swift:45:95: error: cannot find type 'URLRequest' in scope
    private func prepareRequest<BodyType: Encodable>(_ endpoint: Endpoint, body: BodyType) -> URLRequest {
                                                                                              ^~~~~~~~~~
/src/.build/checkouts/OpenAISwift/Sources/OpenAISwift/OpenAISwift.swift:28:34: error: type 'URLSession' (aka 'AnyObject') has no member 'shared'
        let session = URLSession.shared
                      ~~~~~~~~~~ ^~~~~~
/src/.build/checkouts/OpenAISwift/Sources/OpenAISwift/OpenAISwift.swift:48:23: error: cannot find 'URLRequest' in scope
        var request = URLRequest(url: urlComponents!.url!)
                      ^~~~~~~~~~

Potential Solution

By adding the below code to the OpenAI.swift - I think this problem would be alleviated.

#if canImport(FoundationNetworking) && canImport(FoundationXML)
import FoundationNetworking
import FoundationXML
#endif

Are you cool with me opening a PR to add this in?

Thanks!

[adamrushy]

Yeah, great idea and thanks for contributing! I shall get this merged after running Actions!