Add XTTS

[behnaz-motavali]

ⓍTTS is an open-source voice generation model released by Coqui in 2024, designed to address the issue of limited language support. Built upon the Tortoise model, XTTS is an excellent candidate for the audio generation models.

https://huggingface.co/coqui/XTTS-v2

[liesenf]

✅ Couldn't find any mention of OS for this particular model but the whole coqui XTTS model family is said to be open source so should qualify
✅ still very popular
Include!

[behnaz-motavali]

They mentioned open-source on their demo page: Leave a star 🌟 on Github , where our open-source inference and training code lives. Also, they have MPL-2.0 license, which I think is open-source.