Add metadata

This PR improves the metadata of the model, and ensures a "how to use" button appears at the top right

README.md

@@ -1,5 +1,8 @@
 ---
 license: apache-2.0
+pipeline_tag: image-text-to-text
+library_name: transformers
+base_model: llava-hf/llama3-llava-next-8b-hf
 ---