GitLab

* [feature]: add support for Causvid inference

* [feature]: support long video generation for autoregressive wan2.1-t2v

* [feature]: support long video generation for autoregressive wan2.1-t2v

* Update wan_t2v_causal.json

* Update run_wan_t2v_causal.sh

* update readme for Wan2.1-T2V-CausVid

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Co-authored-by: Yang Yong(雍洋) <yongyang1030@163.com>