Add Transformers library tag and link to code repository

This PR ensures the Transformers library tag is included, and a link to the code repository is included.

README.md

@@ -1,6 +1,7 @@
 ---
 license: apache-2.0
 pipeline_tag: text-generation
+library_name: transformers
 ---
 
 # 🧨 FLAME-MoE