Did so many changes in AeroOS!

heres explained in detail:

1. Added boot sequence. shutdownScreen > bootScreen > lockScreen > desktop
2. Updated top menu bar with flyouts (system tray, battery, volume, wifi and calendar)
3. Added more apps. (settings, file explorer, media player and games)
4. Moved wallpaper changing logic to settings
5. File manager content like audio, video and image opens through media viewer.
6. Games Explorer currently supports 5 games, all embedded through <iframe>
7. Added custom right click context menu.
8. Added windows like start button.

note: several minor issues, such as unconnected links between the Start menu and applications, are currently known and will be resolved in future.

what we do next: polish