Add pipeline tag, links to paper and code

This PR adds the pipeline tag, ensuring people can find this model at https://huggingface.co/models?pipeline_tag=video-to-video. It also adds a link to the paper and code.

README.md

@@ -1,3 +1,8 @@
----
-license: mit
----
+---
+license: mit
+library_name: diffusers
+pipeline_tag: video-to-video
+---
+This repository contains the model described in the paper [DrivingWorld: Constructing World Model for Autonomous Driving via Video GPT](https://huggingface.co/papers/2412.19505).
+
+Code: https://github.com/YvanYin/DrivingWorld