This PR updates the HaVG dataset card by:
- Adding a link to the HausaNLP project homepage: https://catalog.hausanlp.org
- Adding a link to the main HausaNLP GitHub organization: https://github.com/HausaNLP
- Linking to the recent survey paper "HausaNLP: Current Status, Challenges and Future Directions for Hausa Natural Language Processing" (https://huggingface.co/papers/2505.14311) in the `Paper` field and providing additional context in the dataset summary. The original citation for the HaVG dataset remains in the 'Citation Information' section.
- Including additional relevant tags (`multimodal`, `low-resource`, `multilingual`, `hausanlp`, `visual-genome`) in the metadata for better discoverability.
