This PR adds a comprehensive model card for the WebDancer model, described in the paper [WebDancer: Towards Autonomous Information Seeking Agency](https://huggingface.co/papers/2505.22648).
Key improvements include:
- Enriching the metadata with `pipeline_tag: image-text-to-text`, `library_name: transformers`, and relevant `tags` such as `web-agent`, `gui-agent`, and `information-seeking`.
- Including the paper abstract for better context.
- Highlighting key features and performance metrics.
- Providing a detailed `Quick Start` section with a Python code example for easy inference using the `transformers` library, including multimodal input handling.
- Showcasing the model's capabilities with embedded demo videos.
- Ensuring proper citation information is available.
This update aims to make the model more discoverable and user-friendly for the community.
