Delta Mush Animation

/**
 * Node that applies Delta Mush to each frame in an animation sequence
 * and stores the resulting corrections as morph targets driven by the animation.
 * 
 * This is useful for fixing skinning artifacts like volume loss at joints
 * by automatically generating corrective shapes for each frame.
 * 
 * Usage:
 * 1. Connect a skeletal mesh (RestPose) and animation sequence
 * 2. Configure Delta Mush settings
 * 3. Click "Apply" to process the animation and create corrective morph targets
 */