Make demo for Audio Speech Stream

[nezhyborets]

Is your feature request related to a problem? Please describe. The usage of Audio Speech Stream is not trivial. The community discussed and provided the solution, see https://github.com/MacPaw/OpenAI/issues/185. It would be great if Demo represents the solution so people would be able to use that as a guide.

Describe the solution you'd like I think we can use https://github.com/mihai8804858/swift-chunked-audio-player package directly in Demo and build a demo functionality page around that.

Describe alternatives you've considered To just put a link to https://github.com/mihai8804858/swift-chunked-audio-player in Readme under Audio Speech Stream section