v2.2.0: Mac OS support enters beta, CLI and script features, and numerous bug fixes

New features:

• New Mac OS code enables proper multi monitor support! Polish on Mac is somewhere between an alpha and a beta. Big thanks to @douira for testing!
• Windows: fading wallpaper transition
• CLI now supports advanced spanning settings and starting Superpaper running a pre-configured profile
• Support for running a script after the wallpaper has been changed: see the example script here
• Support for hidden files in in the file picker
• Better XFCE support
• Gnome dark mode support

Bug fixes:

• Fix precision problem in the exact position entry tool
• Fix align test
• Fix hotkey support on Python 3.10+
• Rotate images based on their EXIF tags
• Attempt to fix the Ubuntu gsettings backend issue for good
• Various GUI fixes
• Various minor bug fixes