[FEATURE REQUEST] Allow lossless renderings

[fbranschke]

Hello!

I am working on a project, where it is important to compare the quality of different scenes. I've noticed, that in the _renderer.py, images are sent as jpeg.

self.client.scene.set_background_image(
                img,
                format="jpeg",
                jpeg_quality=70 if task.action in ["static", "update"] else 40,
                depth=depth,
            )

I would be great to have the option to set the quality to 100% or to use a lossless image format. This impacts the performance, but having the option to switch between two rendering modes (performance and quality) in the GUI would be a helpful feature.