This PR enhances the dataset card by:
- Adding `task_categories: other` and relevant `tags` (physics, general-relativity, neural-fields, scientific-computing) to the metadata for better discoverability.
- Including a direct link to the Hugging Face paper page ([https://huggingface.co/papers/2507.11589](https://huggingface.co/papers/2507.11589)) for improved integration within the Hub.
- Adding a link to the associated GitHub repository ([https://github.com/AndreiB137/EinFields](https://github.com/AndreiB137/EinFields)) for direct access to the code and usage instructions.
- Expanding the overall description to provide more context about the EinFields framework and the nature of the datasets.
