This will make the session manager give Helvum full permissions even when
used from flatpak or otherwise restricted, so that we can always change
the graph even if permissions become more restricted in the future.
This ports the application to libadwaita, enabling us to use the libadwaita stylesheet and
widgets to better implement the Gnome Human Interface Guidelines.
Format params for links and ports are now being watched for in the pipewire connection code.
The parsed media type is then set on the port widget / link object
and they are colored accordingly.
For ports, which were already colored before, this new method of determining the media type
should be more reliable and accurate as this uses the real Format/EnumFormat
params instead of parsing optional properties.
