Hi! I'm Niels from the Hugging Face community team.
This PR improves the model card for SceneGen:
- Adds the `arxiv: 2508.15769` tag to the metadata to link the repository to the [Hugging Face paper page](https://huggingface.co/papers/2508.15769).
- Updates the teaser image URL from a relative path to an absolute path pointing to GitHub, ensuring it renders correctly on the Hub.
- Adds descriptive tags (`3d`, `scene-generation`) for better discoverability.
- Organizes the resource links (Paper, Project Page, Code) at the top of the README.
