[Feature Request] wan2.1 video generation model onnxruntime ~

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### Describe the feature request

With the rapid development of AI technology, many video generation models have emerged, such as the popular wan2.1. Although onnx is excellent in cross-platform, its ability in video generation models is very limited. Usually, video generation models are more than tens of GB, and onnx's current architecture seems difficult to support such large models. In the future, does onnx have plans to support them? Thank you~

https://github.com/Wan-Video/Wan2.1

### Describe scenario use case

onnx supports open source video models, such as wan2.1~

Start by reviewing the feature request and the linked Wan2.1 project alongside ONNX Runtime's existing model-support architecture. The payload names no files, tests, or entry points, so the scope and completion criteria would need to be established before implementation.

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