This PR enhances the model card for the XY-Tokenizer model. It adds the `pipeline_tag: audio-to-audio` to the metadata, improving discoverability on the Hub.
The content now includes comprehensive information ported from the project's GitHub README, such as an overview, highlights, installation instructions, usage examples, and citation details. Links to the official paper on Hugging Face and the GitHub repository are also provided for easy access to relevant resources. Placeholder links for demos/blogs have been updated to point to the paper URL for consolidated information.
