Update StableSigner refine flow and UI

Update some videos

Add the modified openpose and add confidence level filtering.

Add verified posture setting

Add a setting that enables hiding and showing the main line.

Update the demo of the smooth version of the pose video. The bottom part of the upper body needs to be optimized.

This enables some controls to be turned on and off.

Add a visual gallery demonstration

Official version v0.1

Achieve the interpolation effect at the npz level

Add optimized ControlNeXt-SVD-v2 implementation with direct pose input support

Refactor to use individual NPZ files instead of merged database