basic flatpak install

sudo apt install flatpak
sudo apt install plasma-discover-flatpack-backend
sudo apt install gnome-software-plugin-flatpak
flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
flatpak remote-add --if-not-exists kdeapps --from https://distribute.kde.org/kdeapps.flatpakrepo
flatpak install flathub org.kde.Platform//5.11
flatpak install flathub org.freedesktop.Platform.Locale//1.6