Support for Google Gemini

[therealbryanho]

It'd be great to get support for Google Gemini too

[ObjectJosh]

@therealbryanho Thanks for the recommendation! Added to the list ✅
Contributions welcome, if anyone wants to give this a shot :)

[Mihir1003]

Really excited to see how well Gemini 1.5 does specially with its insane context window. I wonder if it is able to reason through all of its context window

[amphetamarina]

I think with #53 it should be possible to use Gemini, but might need to check LiteLLM support for it.

[Elite]

Excited to see Google Gemini support in coming versions :)