This PR enriches the model card by:
- Adding `pipeline_tag: image-to-3d` to categorize the model correctly for search and display on the Hub.
- Linking to the official paper: [Gen-3Diffusion: Realistic Image-to-3D Generation via 2D & 3D Diffusion Synergy](https://huggingface.co/papers/2412.06698).
- Providing a link to the project page: https://yuxuan-xue.com/gen-3diffusion.
- Including a link to the GitHub repository: https://github.com/YuxuanSnow/Gen3Diffusion.
- Adding a sample usage section with code snippets directly from the GitHub README to demonstrate how to run inference.
- Incorporating key insights, pretrained weights download instructions, and citation information from the GitHub repository for a comprehensive overview.
Please review and merge this PR if everything looks good.
