Add Support for LTXV

[eranlevinlt]

Hello,

First off, This project is truly exciting, and I appreciate the effort behind it. 🎉

I’d like to propose adding official support for LTXV (Lightricks Text-to-Video model). There’s already an existing implementation here:
https://github.com/zishen-ucap/LTX-Video-xDiT

LTXV is capable of running in real time with its current setup. With your expertise and optimizations, I believe it could perform even faster under the xDiT framework.

Let me know your thoughts!

Thank you! 🙏