- Added Onedrive folder check for Windows.
- Added iCloud and Downloads folder checks for macOS.
- Added sudo checks for macOS/Linux.
- Added dialogue prompts for macOS/Linux.
- Added unofficial build warning for detected Flatpak install.
These checks have console fallbacks in case the GUI decides it doesn't want to work that day.
Reviewed-on: https://git.ryujinx.app/projects/Ryubing/pulls/4
