This PR improves the model card for MUSEG-3B by:
- Adding `library_name: transformers` to the metadata, based on `config.json` indicating `Qwen2_5_VLForConditionalGeneration` architecture and `transformers_version`, which enables the automated "how to use" widget on the model page.
- Incorporating a "Performance" section with an image, "Environment Setup" instructions, and a "Sample Usage" code snippet, all directly sourced from the project's GitHub README to provide more comprehensive information and quick start guidance.
