[Feature] Support Z-Image Control nets

[stduhpf]

Feature Summary

Supporting Contronet models such as Z-Image-Turbo-Fun-Controlnet-Union

Detailed Description

Controlnet models for Z-Image Turbo have already started rolling out. Sadly they are not supported in sdcpp right now.
Example: https://huggingface.co/alibaba-pai/Z-Image-Turbo-Fun-Controlnet-Union/tree/main

Alternatives you considered

No response

Additional context

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[stduhpf]

I'm not sure if controlnets are supported for any DiT models right now, It's the first one I try, but looking at the code it looks like it's for u-net models only?