Implement gs_plugin_add_search_what_provides() in flatpak
From this comment:
For what it's worth, only packagekit and rpm-ostree plugins implement
gs_plugin_add_search_what_provides
, thus even if the flatpak (Flathub) provides anything, it is not checked for. The rpm-stree plugin returns three results:gs_plugin_add_search_what_provides: 'application/x-msi' gs_plugin_add_search_what_provides: pkglist:3 gs_plugin_add_search_what_provides: [0] 'bottles-3.1.4-1.fc34.noarch' gs_plugin_add_search_what_provides: [1] 'wine-desktop-6.6-1.fc34.noarch' gs_plugin_add_search_what_provides: [2] 'q4wine-1.3.12-4.fc34.x86_64'
but they have set to be hidden from the search, which I believe is a typo, because the desktop applications can be used here.