Add paper link and task category

This PR adds basic metadata to the dataset card, including a link to the paper, the project page URL and setting the relevant `task_categories`.

README.md

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+---
+license: mit
+task_categories:
+- image-text-to-text
+---
+
+This repository contains the dataset used for [JARVIS-VLA: Post-Training Large-Scale Vision Language Models to Play Visual Games with Keyboards and Mouse](https://huggingface.co/papers/2503.16365).
+
+[Project Website](https://craftjarvis.github.io/JarvisVLA/)