Add pipeline tag, library name and link to project page

This PR improves the model card by adding the relevant `library_name` and `pipeline_tag`. It also adds a link to the project page.

README.md

@@ -6,10 +6,14 @@ tags:
 - world-model
 - video-prediction
 - llama
+pipeline_tag: robotics
+library_name: transformers
 ---
 
 See https://github.com/thuml/RLVR-World for examples for using this model.
 
+Project page: https://thuml.github.io/RLVR-World
+
 ## Citation
 
 ```