[request] Linux (& Mac) support

[ahjolinna]

This feature would be really nice at least when valve is focusing alot now on Linux (steamOS), and it should not be that hard to implement.

[jonathanlermitage]

Hi,
Steam Cleaner seems to be useless on Linux since there are no redistributable packages installers to remove.
Meanwhile, if you've found things to clean, I'll do my best to make Steam Cleaner work on Linux too.

[eddiecsilva]

With Valve's current Proton implementation running Windows games under Linux, is it possible that there is now a real use case for a cleaning tool?