Add support of visualization

[lmxue]

✨ Description

We release the Visualization Tool, a unique feature in Amphion, designed to visually analyze classical audio, music, and speech generation models for educational purposes. It offers an interactive experience for beginners, engineers, and researchers alike, enabling them to explore and understand the inner workings of generative models.

Currently, Amphion supports a visualization tool of the diffusion model for singing voice conversion, named SingVisio. The paper of SingVisio: Visual Analytics of the Diffusion Model for Singing Voice Conversion is available now. Additionally, SingVisio tool can be experienced here.

SingVisio Demo

SingVisio_Demo.mp4

🚧 Related Issues

#124

👨‍💻 Changes Proposed

• Add a README.md file in the egs/visualization directory to introduce Amphion's visualization feature.
• Add a README.md file in the egs/visualization/SingVisio directory to introduce SingVisio.
• Integrate web-based user interface of SingVisio to the Amphion/visualization/SingVisio directory.

🧑‍🤝‍🧑 Who Can Review?

@yuantuo666 @RMSnow

🛠 TODO

None

✅ Checklist

• Code has been reviewed
• Code complies with the project's code standards and best practices
• Code has passed all tests
• Code does not affect the normal use of existing features
• Code has been commented properly
• Documentation has been updated (if applicable)
• Demo/checkpoint has been attached (if applicable)

[RMSnow]

Re-check all the copyright information for newly added files. Replace them with Amphion's if necessary. Others look good to me.