Book Flatten and Crop - Qwen Image Edit 2509

Flattens, crops and merges images that are split between 2 pages. User will need to play around with aspect ratio and resolution to get it right (different books have different aspect ratios). Works well with https://huggingface.co/Osrivers/Qwen-Image-Edit-2509-Lightning-4steps-V1.0-bf16.safetensors/tree/main and https://huggingface.co/eigen-ai-labs/eigen-banana-qwen-image-edit for speed and color accuracy.