Improve model card: Add metadata, Hugging Face paper link, and GitHub link

This PR enhances the model card for COOPER by:
- Adding `pipeline_tag: image-text-to-text` to improve discoverability.
- Including `library_name: transformers` in the metadata, as indicated by the installation instructions in the GitHub repository, enabling the auto-generated usage snippet on the Hub.
- Adding `license: cc-by-nc-4.0` based on the majority vote from colleagues.
- Providing a direct link to the Hugging Face paper page ([COOPER: A Unified Model for Cooperative Perception and Reasoning in Spatial Intelligence](https://huggingface.co/papers/2512.04563)) in the header.
- Adding an explicit link to the GitHub repository (`https://github.com/zhangzef/COOPER`) in the header for easy access to the code.
- Correcting image paths from `./assests/` to `https://huggingface.co/Starrrrrry/COOPER/resolve/main/assets/` to align with the GitHub repository structure and ensure robust rendering on the Hub.

Please review and merge if these updates look good.

README.md

@@ -1,7 +1,15 @@
+---
+pipeline_tag: image-text-to-text
+library_name: transformers
+license: cc-by-nc-4.0
+---
+
 # COOPER 🧭
 
 <p align="center">
-  📄 <a href="https://arxiv.org/pdf/2512.04563">Paper</a> |
+  📄 <a href="https://arxiv.org/pdf/2512.04563">Paper (arXiv)</a> |
+  🤗 <a href="https://huggingface.co/papers/2512.04563">Paper (Hugging Face)</a> |
+  💻 <a href="https://github.com/zhangzef/COOPER">Code</a> |
   🤖 <a href="https://huggingface.co/Starrrrrry/COOPER">COOPER Model</a> |
   🧠 <a href="https://huggingface.co/Starrrrrry/COOPER-AMG">COOPER-AMG Model</a> |
   📂 <a href="https://huggingface.co/datasets/Starrrrrry/COOPER_Train_Set">COOPER Training Data</a>
@@ -12,10 +20,10 @@ This project provides the **official implementation of COOPER**, a **unified mul
 <!-- ![motivation](./assests/motivation.png) -->
 
 <p align="center">
-  <img src="./assests/motivation.png" width="50%" />
+  <img src="https://huggingface.co/Starrrrrry/COOPER/resolve/main/assets/motivation.png" width="50%" />
 </p>
 
-![model](./assests/model.png)
+![model](https://huggingface.co/Starrrrrry/COOPER/resolve/main/assets/model.png)
 
 
 ## 🚀 Key Features
@@ -116,19 +124,19 @@ sh eval_bagel_with_judge.sh
 
 ## 📈 Results
 
-![main_result](./assests/main_result.png)
+![main_result](https://huggingface.co/Starrrrrry/COOPER/resolve/main/assets/main_result.png)
 
 
 
 ### 📚 Cases
 
-You can find more cases in the `./assests` folder.
+You can find more cases in the `./assets` folder.
 
-![cases](./assests/cases.png)
+![cases](https://huggingface.co/Starrrrrry/COOPER/resolve/main/assets/cases.png)
 
 
 
-![generation_cases](./assests/generation_cases.png)
+![generation_cases](https://huggingface.co/Starrrrrry/COOPER/resolve/main/assets/generation_cases.png)
 
 
 ## ✍️ Citation