Upcoming features

[stevenosse]

• [x] LocalStorage solution with local persistence (shared prefs) and in memory implementations
• [x] Default Toast solution for showing informations messages (using ScaffoldMessenger)
• [x] Add preconfured theme extension for custom theme colors
• [x] Dialog components (for showing informative and confirmation dialogs)
• [x] Default logger
• [x] Install script + config file (for changing app name and package, icon)
• [ ] Error and empty state components
• [ ] CLI for creating features