Link dataset to paper, code snippet

This PR links the dataset to the paper page: https://huggingface.co/papers/2407.06190, and as a code snippet to showcase how to download the data.

Cheers!

README.md

@@ -0,0 +1,16 @@
+---
+tags:
+- autonomous-driving
+---
+
+# SuperPixel dataset
+
+This repository contains the data of the paper [4D Contrastive Superflows are Dense 3D Representation Learners(https://huggingface.co/papers/2407.06190).
+
+Data can be downloaded using the one-liner `hf_hub_download`, for instance:
+
+```python
+from huggingface_hub import hf_hub_download
+
+filepath = hf_hub_download(repo_id="Xiangxu-0103/SuperFlow_SuperPixel", filename="downstream_nuscenes_infos_train_1.pkl", repo_type="dataset")
+```