Improve model card: Add pipeline tag, library name, and project page

This PR enhances the model card by:
- Moving `text-generation` from `tags` to `pipeline_tag` metadata for better discoverability.
- Adding `library_name: transformers` to the metadata, enabling the automated code snippet on the Hub.
- Adding a direct link to the project page for easy access.

These changes will improve the model's visibility and user experience on Hugging Face.

README.md

@@ -1,19 +1,21 @@
 ---
 language:
 - en
+license: apache-2.0
+pipeline_tag: text-generation
+library_name: transformers
 tags:
 - dllm
 - diffusion-language-model
-- text-generation
 - diffusion
 - language-model
-license: apache-2.0
 ---
 
 # HDLM-Gamma: Hybrid Diffusion Language Model
 
 [![Paper](https://img.shields.io/badge/Paper-arXiv-red)](https://arxiv.org/abs/2504.06416)
 [![Code](https://img.shields.io/badge/Code-GitHub-blue)](https://github.com/ServiceNow/hdlm)
+[![Website](https://img.shields.io/badge/Website-green)](https://hdlm-colm.github.io/)
 
 This is the model card for **dlm-group/hdlm-base-gamma-0.01**. 
 
@@ -142,4 +144,4 @@ Available gamma values and their characteristics:
 
 ## License
 
-This model is released under the same license as the original HDLM codebase. Please refer to the [GitHub repository](https://github.com/ServiceNow/hdlm) for license details.
+This model is released under the same license as the original HDLM codebase. Please refer to the [GitHub repository](https://github.com/ServiceNow/hdlm) for license details.