[Feature] LTX-2 model support

[ASVIEST]

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

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[appartamento]

LTX 2.3 has been released. GGUFs already available. Amazing results.

[kmnnmk212-source]

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[wbruna]

WIP: #1463