Support for iOS (@1x, @2x, @3x) and Windows (scale-100, scale-125 etc.) image sizes

[BurkusCat]

iOS and Windows have their own standard formats for image sizes:

• https://developer.apple.com/design/human-interface-guidelines/ios/icons-and-images/image-size-and-resolution/
• https://docs.microsoft.com/en-us/windows/uwp/app-resources/tailor-resources-lang-scale-contrast#scale

It would be nice if this application supported generating the standard sizes for Android, iOS, and Windows simultaneously. Maybe tickboxes for each platform you want to generate for?