Get Animation Frame

/**
 * Node that retrieves a mesh at a specific frame from an animation sequence.
 * 
 * This node takes a skeletal mesh (in rest pose) and an animation sequence,
 * then outputs the deformed mesh at the specified frame index.
 * 
 * Usage:
 * 1. Connect a skeletal mesh (RestPose) and animation sequence
 * 2. Set the desired frame index
 * 3. Click "Retrieve Frame" to capture the mesh at that frame
 * 4. The output Mesh pin will contain the deformed mesh
 */