🍎 Add Apple Support & a lot more 🚀

Finally, macOS support is here!

Added

• Added sudoPassword to UserChoice model
• Added asking for Sudo Password on macOS only in CustomizeStepView
• macOS Script:
  • Install Flutter SDK
  • Unzip Flutter SDK
  • Add Flutter SDK to PATH
  • Install Git (requires brew)
  • Install Android Studio
  • Install IntelliJ IDEA
  • Install Visual Studio Code
• Implemented notes by Tao Dong and Will Larche

Fixed

• A naming mistake in CustomizeView
• Borders of text fields in CustomizeView
• Small bugs here and there

Removed

• Removed sandbox mode from macOS