Add prompt truncation, CUDA cache clearing, and memory management

Fix: All resolutions now divisible by 32 (LTX requirement)

Add Image-to-Video and resolution presets (16:9, 9:16, 1:1, 21:9, 4:3)

Add imageio and imageio-ffmpeg for video export

Upload README.md with huggingface_hub

Upload requirements.txt with huggingface_hub

Upload app.py with huggingface_hub

initial commit