Fixes#44
This commit changes the way that screen rotation is detected. Instead of
using Mutter's DBus interface, we now listen directly for X and Wayland
events indicating the screen has been rotated (RRScreenChangeNotify and
wl_output::geometry events). This has the advantage of working outside
of Phosh.
The clang-format-12 package no longer exist and only clang-format 11, 13
and 14 remain in the repositories.
Also replace apt with apt-get since apt is not for scripting
clang-format always manages to mix spaces into tab-based indentation.
Since we already require an exact tab-width of 8 it makes more sense to
use spaces.
