[Documentation] Can the main README specify whether it works on windows or not

[rubyFeedback]

Can the main README specify whether it works on windows or not?

I work mostly on Linux and here everything works well.

Recently I had a use case to also use windows, and delete pages from a .pdf
file. For this I create a backup file first. In the past I was copying the .pdf
file to a temp directory, but this is not always available, so I was thinking
of also adding support for tempfile, and then letting the user decide
what to use. It would be helpful to know whether tempfile works on
windows as-is, and whether there are any issues in this regard.