aisdk.providers 0.1.0

• First release. Adds additional AI model provider adapters for the aisdk toolkit, covering OpenAI-compatible and Anthropic-compatible services (DeepSeek, Moonshot/Kimi, Stepfun, Volcengine, AiHubMix, xAI, OpenRouter, Bailian and NVIDIA). Providers register themselves with the core aisdk provider registry on load.