v0.17.0

What's Changed

chore(OpenAI): deprecate Assistants API officially by @iBotPeaches in https://github.com/openai-php/client/pull/679
Adds @iBotPeaches to the suggested sponsors in the README by @ianhawes in https://github.com/openai-php/client/pull/677
fix(OpenAI): have a robust ErrorException to handle object/string error responses. by @iBotPeaches in https://github.com/openai-php/client/pull/682
feat(OpenAI): add Conversation API by @iBotPeaches in https://github.com/openai-php/client/pull/658
fix(Doubao): increase nullability on image usage types by @iBotPeaches in https://github.com/openai-php/client/pull/684
fix(OpenAI) - add missing pagination fields to files.list by @iBotPeaches in https://github.com/openai-php/client/pull/687
Fix undefined array key errors for xAI Responses API by @dnnp2011 in https://github.com/openai-php/client/pull/689
fix(OpenAI): prevent registration of headers on all requests by @iBotPeaches in https://github.com/openai-php/client/pull/688
Update README.md by @carvemerson in https://github.com/openai-php/client/pull/691
release: v0.17.0 by @iBotPeaches in https://github.com/openai-php/client/pull/694

@ianhawes made their first contribution in https://github.com/openai-php/client/pull/677
@dnnp2011 made their first contribution in https://github.com/openai-php/client/pull/689
@carvemerson made their first contribution in https://github.com/openai-php/client/pull/691

Full Changelog: https://github.com/openai-php/client/compare/v0.16.1...v0.17.0