[Feature] LTX-2 model support

### Feature Summary

New video generator model

### Detailed Description

LTX-2 is new video generator model that IMHO better than Wan 2.2.
https://huggingface.co/QuantStack/LTX-2-GGUF
https://github.com/Lightricks/LTX-2
https://huggingface.co/Lightricks/LTX-2

### Alternatives you considered

_No response_

### Additional context

_No response_