Support multiple drives

At the moment, trying to compress files from a drive which isn’t the main drive results in an error. It would be nice if this was supported natively.

finalize-output-file-candidate
Caused by: 0: fs-rename-error from=C:\Users\[REDACTED]\AppData\Local\com.getcompress\intermediate-output\file_zgyVpTdjgm-iteration-0.getcompress-tmp-file_zgyVpTdjgm-iteration-[REDACTED] to=[REDACTED] 1: The system cannot move the file to a different disk drive. (os error 17)