Adjust visualization script to adjusted output format

[Peter9192]

This adjusts the SVSegmentation object to be compatible with the output structure from

streetscapes/scripts/segment_optimized.py

Lines 246 to 254 in 600f281

	segmentation = {
	"image_path": image_path,
	"masks": instance_masks,
	"instances": instances,
	}
	save_dir = image_path.parent / "segmentations" / "dinosam"
	save_dir.mkdir(parents=True, exist_ok=True)
	save_path = save_dir / (image_path.stem + ".npz")

to try it out, re-install the package from this branch:

pip install git+https://github.com/Urban-M4/streetscapes.git@fix-visualize

[cantordust]

@Peter9192 Do we still need this?