Added async support

[wkok]

Fixes #52

Added async support. When passing :async? true the result returned to the caller will be a Future that can be de-referenced for example:

@(create-chat-completion {:model    "gpt-3.5-turbo"
                          :messages [{:role "system" :content "You are a helpful assistant."}
                                     {:role "user" :content "Who won the world series in 2020?"}
                                     {:role "assistant" :content "The Los Angeles Dodgers won the World Series in 2020."}
                                     {:role "user" :content "Where was it played?"}]}
                         {:request {:async? true}})

[nsadeh]

hey @wkok , works great, except one thing that surprises me a little bit is that the async response contains a bunch of request-level data but the sync response doesn't. It only contains what's in the :body keyword on the async response. Is that intentional? I would expect their responses to be identical except that one comes inside a future, unless there's a reason for it.

[wkok]

Hey @nsadeh not intentional, it was what martian returned, but I agree it would be better to be consistent.

I've now wrapped it in another future that only returns the :body, could you try it out?

[nsadeh]

Hey @nsadeh not intentional, it was what martian returned, but I agree it would be better to be consistent.

I've now wrapped it in another future that only returns the :body, could you try it out?

Sorry I was slammed at work. I'll be glad to check it today if you want, though based on the last check it worked fine except for the body thing. LMK if you would like any help. Thanks for adding this feature to your awesome library.