Add dataset card, link to paper

This PR ensures the dataset is linked to (and can be found at) https://huggingface.co/papers/2503.07597.

It also adds a link to the Github repository and the appropriate task category.

README.md

@@ -1,3 +1,11 @@
----
-license: apache-2.0
----
+---
+license: apache-2.0
+task_categories:
+- video-classification
+---
+
+This repository contains the dataset for the paper [HumanMM: Global Human Motion Recovery from Multi-shot Videos](https://huggingface.co/papers/2503.07597).
+
+Project page: https://zhangyuhong01.github.io/HumanMM
+
+Code: https://github.com/zhangyuhong01/HumanMM-code