Feat Support chat completion response format and seed new fields

[henomis]

Describe the change
This branch implements the support for chat completion response format optional field

Describe your solution
A new type has been added to support this new field.

[codecov]

Codecov Report

Merging #525 (5502fce) into master (d07833e) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #525   +/-   ##
=======================================
  Coverage   97.59%   97.59%           
=======================================
  Files          19       19           
  Lines         872      872           
=======================================
  Hits          851      851           
  Misses         15       15           
  Partials        6        6           

Files	Coverage Δ
chat.go	100.00% <ø> (ø)

[stillmatic]

IMO lint should be a separate PR but this LGTM -- consider also adding seed here? It's also part of the new release, should similarly also require adding a single int parameter

https://platform.openai.com/docs/api-reference/chat/create#chat-create-seed

[carsonkahn-external]

Let's address seed:

Suggested change

	ResponseFormat *ChatCompletionResponseFormat `json:"response_format,omitempty"`
	ResponseFormat *ChatCompletionResponseFormat `json:"response_format,omitempty"`
	Seed *int `json:"seed,omitempty"`

[henomis]

I agree @stillmatic
Thanks @carsonkahn-external

[sashabaranov]

@henomis thank you for the PR! Could you please rebase on the latest master version so we could have clean CI runs here? (works for other PRs too!)

[iflamed]

May not the best choice to set the type as a pointer. Should we use the value type as the other field.

[henomis]

Thanks

[jackieli-tes]

This is optional. So it should have been a pointer: *ChatCompletionResponseFormat. Now I get:

status code: 400, message: '' is not one of ['json_object', 'text'] - 'response_format.type'