Add pipeline tag and library name

This PR adds the `image-text-to-text` pipeline tag and the `diffusers` library name to the model card. This will improve the discoverability of the model and ensure it's properly categorized on the Hugging Face Hub.

README.md

@@ -1,5 +1,7 @@
 ---
 license: apache-2.0
+pipeline_tag: image-text-to-text
+library_name: diffusers
 ---
 
 # HermesFlow
@@ -34,6 +36,4 @@ HermesFlow is a general alignment framework for multimodal LLMs, which cruate ho
   journal={arXiv preprint arXiv:2502.12148},
   year={2025}
 }
-```
-
-
+```