This PR significantly enhances the model card by:
- Adding the `pipeline_tag: unconditional-image-generation` for better discoverability on the Hugging Face Hub.
- Including a direct link to the research paper: [GAS: Improving Discretization of Diffusion ODEs via Generalized Adversarial Solver](https://huggingface.co/papers/2510.17699).
- Adding the official GitHub repository link: https://github.com/3145tttt/GAS.
- Incorporating the full abstract of the paper to provide a comprehensive description of the model.
- Adding the teaser image from the GitHub repository for visual context.
- Providing a practical sample usage code snippet from the GitHub README, demonstrating how to perform inference with a trained model.
Please review these additions and merge if everything looks good.
