Improve model card: Add prominent code and project links

This PR improves the model card for Hermes 4 by enhancing the discoverability of its associated resources:

- Adds a direct link to the **GitHub repository** for Hermes 4 (`https://github.com/NousResearch/Hermes-4`) at the top of the model card. The GitHub URL was previously not explicitly linked.
- Elevates the **Project Page link** (`https://huggingface.co/collections/NousResearch/hermes-4-collection-68a731bfd452e20816725728`) to a more prominent position at the top, making it easier for users to find the full collection of Hermes 4 models.

All existing, correct information, including the paper link, usage examples, and comprehensive metadata, has been preserved.

README.md

@@ -38,6 +38,9 @@ model-index:
 
 ![image/jpeg](https://cdn-uploads.huggingface.co/production/uploads/6317aade83d8d2fd903192d9/roT9o5bMYBtQziRMlaSDf.jpeg)
 
+**Project Page**: [https://huggingface.co/collections/NousResearch/hermes-4-collection-68a731bfd452e20816725728](https://huggingface.co/collections/NousResearch/hermes-4-collection-68a731bfd452e20816725728)
+**Code**: [https://github.com/NousResearch/Hermes-4](https://github.com/NousResearch/Hermes-4)
+
 ## Model Description
 
 Hermes 4 70B is a frontier, hybrid-mode **reasoning** model based on Llama-3.1-70B by Nous Research that is aligned to **you**.