Support fun control variants for Wan

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.

Start by reading the linked Hugging Face collection and Wan2.2-Fun-A14B-Control model card to identify the requested control variants and expected examples. Then inspect the repository's existing Wan support and related control-model implementations; done means the requested variants are supported with coverage for the demonstrated workflows.

Scritto dal modello di indicizzazione a partire dal testo della issue.