ControlNeXt support

Is your feature request related to a problem? Please describe. ControlNeXt claims to improve control, generation performance & reduce VRAM requirements while maintaining or improving fidelity

Describe the solution you'd like Integration of ControlNeXt in addition / instead of the current ControlNet integration

Describe alternatives you've considered Stick with the current working implementation. I'm impartial but if ControlNeXt proves superior, the project may benefit

Additional context Project page: https://pbihao.github.io/projects/controlnext/index.html Code: https://github.com/dvlab-research/ControlNeXt Paper: https://arxiv.org/abs/2408.06070