Improve metadata and add GitHub link for Hulu-Med model card

This PR enhances the model card for Hulu-Med by:

* Replacing the `tasks` metadata key with `pipeline_tag: image-text-to-text` for consistency with Hugging Face conventions.
* Adding `library_name: transformers` metadata, as evidenced by the `transformers` imports in the provided Python code snippets, to enable the automated usage widget on the Hub.
* Populating the `tags` field with descriptive keywords such as `medical`, `multimodal`, `vision-language-model`, `image-to-text`, `video-understanding`, `3d-understanding`, `qwen`, and `pytorch` for improved discoverability.
* Adding a GitHub badge to the top of the model card content for direct access to the code repository.
* Correcting the `git clone` URL in the installation instructions from a placeholder to the actual repository URL (`https://github.com/ZJUI-AI4H/Hulu-Med.git`).

These updates aim to provide more accurate and comprehensive information, making the model easier to find and use.

README.md

@@ -1,10 +1,18 @@
 ---
 license: apache-2.0
+tags:
+  - medical
+  - multimodal
+  - vision-language-model
+  - image-to-text
+  - video-understanding
+  - 3d-understanding
+  - qwen
+  - pytorch
 frameworks:
-- pytorch
-tags: []
-tasks:
-- image-text-to-text
+  - pytorch
+pipeline_tag: image-text-to-text
+library_name: transformers
 ---
 
 <div style="display: flex; align-items: center; justify-content: center;">
@@ -18,6 +26,7 @@ tasks:
 [![HuggingFace](https://img.shields.io/badge/🤗%20Hugging%20Face-Models-yellow)](https://huggingface.co/ZJU-AI4H/Hulu-Med)
 [![ModelScope](https://img.shields.io/badge/ModelScope-Models-blue)](https://modelscope.cn/models/Med-Team/Hulu-Med)
 [![License](https://img.shields.io/badge/License-Apache%202.0-green.svg)](LICENSE)
+[![GitHub](https://img.shields.io/badge/GitHub-Code-blue?logo=github)](https://github.com/ZJUI-AI4H/Hulu-Med)
 
 [📄 Paper](http://arxiv.org/abs/2510.08668) | [🤗 Hulu-Med-7B](https://huggingface.co/ZJU-AI4H/Hulu-Med-7B) |[🤗 Hulu-Med-14B](https://huggingface.co/ZJU-AI4H/Hulu-Med-14B) |[🤗 Hulu-Med-32B](https://huggingface.co/ZJU-AI4H/Hulu-Med-32B) | [🔮 ModelScope Models](https://modelscope.cn/models/Med-Team/Hulu-Med) | [📊 Demo](#demo)
 
@@ -127,7 +136,7 @@ We provide three model variants with different parameter scales:
 ## 🛠️ Installation
 ```bash
 # Clone the repository
-git clone https://github.com/your-org/Hulu-Med.git
+git clone https://github.com/ZJUI-AI4H/Hulu-Med.git
 cd Hulu-Med
 # Create conda environment
 conda create -n hulumed python=3.10