[Suggestion] Add support for appstream:// protocol #626
Description
In CachyOS when using the KDE app launcher and typing a software that is not installed it suggests some known software names but as the KDE Software Center is not installed when you select the suggested option it says it cannot read the file "appstream://" (probably xdg-open or kde-open complaining).
If packages have their .desktop "canonical" names declared it would be good to add the MimeType x-scheme-handler/appstream to octopi with a script that translates canonical desktop names to package names and opens octopi with the selected package, or at least searches for the last part of the name.
I couldn't find any CLI argument that would open octopi with a search string otherwise I could write a simple python script with a .desktop to do it.