This PR improves the model card by:
- Adding the `pipeline_tag: audio-to-audio`, making the model discoverable on the Hugging Face Hub.
- Adding `library_name: transformers`, to enable the 'how to use' widget and indicate compatibility with the `transformers` library.
- Adding the paper's title as the main header for better readability and discoverability.
- Refining the 'Source Code' links by pointing the GitHub link to the main project repository and removing the Hugging Face Space link from this section as it does not represent a code repository.
- Including the 'Available Models' table and the academic 'Citation' section for more comprehensive information.
