This PR significantly improves the model card for "DiffusionGS" by:
- Adding the `pipeline_tag: image-to-3d` to enhance discoverability on the Hugging Face Hub for relevant tasks.
- Including a direct link to the paper: [Baking Gaussian Splatting into Diffusion Denoiser for Fast and Scalable Single-stage Image-to-3D Generation and Reconstruction](https://huggingface.co/papers/2411.14384).
- Providing links to the official project page and GitHub repository for easy access to more information and code.
- Incorporating a "Quick Demo" section with the code snippet from the GitHub README.
- Adding visual examples directly linked from the GitHub repository.
- Including the BibTeX citation for proper academic attribution.
Please review and merge this PR if the improvements are satisfactory.
