This PR improves the model card for MedShift by:
- Adding the `image-to-image` pipeline tag to the YAML metadata for better discoverability.
- Linking the repository to the original paper, project page, and official GitHub repository.
- Providing a concise summary of the model's purpose: high-fidelity, unpaired cross-domain translation for X-ray images.
- Adding a BibTeX citation for the paper.
