This PR enhances the model card for `TeleEmbodied/humanoidgen_model` by:
* Adding the `license: cc-by-nc-4.0` to the metadata section, as explicitly stated in the GitHub repository.
* Integrating the paper's abstract into the model card content for a more informative overview.
* Adjusting the title formatting for consistency with Markdown best practices.
* Adding a brief introductory sentence linking the repository content to the paper.
All existing links to the paper, code, homepage, dataset, and other models are correctly maintained.
Please review and merge this PR if it looks good.
