[Feature]: Add `dbus:` provides for the xdg-desktop-portal backends
The specific dbus interfaces that a portal backend can provide is specified in the /usr/share/xdg-desktop-portal/portals/
directory. It would be cool if we can parse that toml file and add a provides to the specific backend package (means in praxis: dbus:org.freedesktop.impl.portal.FileChooser
and a bunch others for xdg-desktop-portal-gtk
)
Sorry for the poor linguistic skills right now.