Support fun control variants for Wan

[sayakpaul]

It would be cool to support the control variants of Wan: https://huggingface.co/collections/alibaba-pai/wan22-fun-68958eabec343b948f1225c5.

https://huggingface.co/alibaba-pai/Wan2.2-Fun-A14B-Control has some very nice examples.

Checking with @a-r-r-o-w if this is already in the works.

[satani99]

i'd like to work on this if no one's working.

[sayakpaul]

All yours. Go ahead.