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d45199a2 - Implement Frequency-Decoupled Guidance (FDG) as a Guider (#11976)

Implement Frequency-Decoupled Guidance (FDG) as a Guider (#11976) * Initial commit implementing frequency-decoupled guidance (FDG) as a guider * Update FrequencyDecoupledGuidance docstring to describe FDG * Update project so that it accepts any number of non-batch dims * Change guidance_scale and other params to accept a list of params for each freq level * Add comment with Laplacian pyramid shapes * Add function to import_utils to check if the kornia package is available * Only import from kornia if package is available * Fix bug: use pred_cond/uncond in freq space rather than data space * Allow guidance rescaling to be done in data space or frequency space (speculative) * Add kornia install instructions to kornia import error message * Add config to control whether operations are upcast to fp64 * Add parallel_weights recommended values to docstring * Apply style fixes * make fix-copies --------- Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com> Co-authored-by: Aryan <aryan@huggingface.co>