[RFE] Ship AppStream metainfo file
AppStream is a cross-distribution effort for enhancing the way we interact with the software repositories provided by (Linux) distributions by standardizing software component metadata. Every add-on to a GUI app should ship an AppStream metafile. This makes it possible to install the add-on using GNOME Software, KDE Discover or any other modern GUI package manager.
Included is a metainfo file, taken from a downstream bugreport, that should be installed in $(sharedir)/appdata.