This PR significantly enhances the dataset card for `MagicData340K`.
It includes:
- Added `task_categories` (`image-text-to-text`, `text-to-image`) and relevant `tags` to the metadata for better discoverability.
- A link to the project page: [https://wj-inf.github.io/MagicMirror-page/](https://wj-inf.github.io/MagicMirror-page/)
- An introductory description of the dataset and the MagicMirror framework, based on the paper abstract.
- An illustrative image from the GitHub repository.
- A clear "Sample Usage" section with a code snippet from the GitHub README for assessing T2I models.
- The BibTeX citation for the paper.
