v1.12.0

What's Changed

docs: add video generation and extension documentation to README by @double-di in https://github.com/xai-org/xai-sdk-python/pull/127
Add collection descriptions, field definition updates, and bytes chunking by @Omar-V2 in https://github.com/xai-org/xai-sdk-python/pull/130
Add expires_after to file uploads, drop team_id from File by @Omar-V2 in https://github.com/xai-org/xai-sdk-python/pull/131
Add cost_usd tracking, model migration, example fixes by @Omar-V2 in https://github.com/xai-org/xai-sdk-python/pull/132
docs: update default API requests timeout from 15min(900s) to 27min(1620s) by @dcbert in https://github.com/xai-org/xai-sdk-python/pull/101
Add cost_usd property to image and video responses by @Omar-V2 in https://github.com/xai-org/xai-sdk-python/pull/133
Prepare to release v1.12.0 of the xAI Python SDK by @Omar-V2 in https://github.com/xai-org/xai-sdk-python/pull/134

Full Changelog: https://github.com/xai-org/xai-sdk-python/compare/v1.11.0...v1.12.0