Add robotics pipeline tag, project page URL, and library name

This PR ensures the model can be found at https://huggingface.co/models?pipeline_tag=robotics and adds the library name. It also adds a link to the project page.

README.md

@@ -5,10 +5,14 @@ tags:
 - rt1
 - tokenizer
 - visual-tokenizer
+pipeline_tag: robotics
+library_name: diffusers
 ---
 
 See https://github.com/thuml/RLVR-World for examples for using this model.
 
+Project page: https://thuml.github.io/RLVR-World
+
 ## Citation
 
 ```