ComfyUI nodes for ControlNext-SVD v2

These nodes include my wrapper for the original diffusers pipeline, as well as work in progress native ComfyUI implementation. For the diffusers wrapper models should be downloaded automatically, for the native version you can get the unet [a/here](https://huggingface.co/Kijai/ControlNeXt-SVD-V2-Comfy/blob/main/controlnext-svd_v2-unet-fp16_converted.safetensors).