Implement 3D mesh visualization with trimesh and marching_cubes

Fix IndexError by clamping slice indices to valid range

Fix: Revert parameter move for Gradio 4.44.0 compatibility

Fix: Set SegResNet init_filters=32 to match checkpoint

Fix: Replaced synthetic data with real CT sample from TotalSegmentator repo and fixed Gradio launch warning

Initial commit: MONAI WholeBody CT Segmentation Space