Detect spaces inside objects for smaller parts

[3DCoded]

Describe the solution you'd like
If there was a way for PrusaSlicer to detect the empty places in, say, a hollow cylinder and put some parts into there with the Arrange tool, it would be able to fit more parts in one build plate.

Describe how it would work
It should be built-in to the Arrange tool.

Describe alternatives you've considered
Right now, I can manually move the objects into the cavities, but when I press Arrange again, it just moves those pieces out.

[stepikovo]

I'm closing this as a duplicate of #8225
You can also read more about the arrange algorithm in #5339 comments