appdata: New summary
Add a new summary that pique people's interest.
https://gitlab.gnome.org/GNOME/Initiatives/-/wikis/App-Metadata#summary
Closes #67 (closed)
Add a new summary that pique people's interest.
https://gitlab.gnome.org/GNOME/Initiatives/-/wikis/App-Metadata#summary
Closes #67 (closed)