Appearance becomes a root menu as shortcuts separate apps from panels

dhh proposed and merged omacom/omarchy#15973 into quattro. Appearance becomes a top-level menu, absorbing Style and grouping window controls under Windows and screensaver and About entries under Branding. Toggle labels describe the action they perform. Users with menu extensions that reference the old IDs will need to update them, although summoning the old style menu keeps working through an alias.

Related quattro commits move Calculator to Super + Shift + Q and Activity to Super + Shift + T, reserving Super + Ctrl for panels and menus. Themes gain Super + Ctrl + T, backgrounds gain Super + Ctrl + W, and Network moves to Super + Ctrl + N; Nightlight remains available through the toggle menu without its former binding. The keyboard screenshot moves to Super + Ctrl + Alt + C, restoring Super + Shift + S to Google Maps. These commits carry attributed coauthor credit for David Heinemeier Hansson, including omacom/omarchy@5264cbbd1396.