Allow Clone

[aniketfuryrocks]

One single reqwest client should be reused and structs like Anthoripic should allow taking shared request client or them-selfves be clone.

I am willing to ship the patch, provided the @graniet is okay with this change.

[graniet]

Hey @aniketfuryrocks, seems to be fair !

[nazq]

@aniketfuryrocks I'd love to see this. Happy to try it out. Happy to PR it if you don't get round to it

[aniketfuryrocks]

Hey @graniet @nazq. Happy new year. Offline for holidays, will get on this next week. Should be a 1-2 hour job.

[nazq]

@aniketfuryrocks I realized I had a half way working branch of this feature. Just cleaned it up and added support for other backends. Take a look at #100