feat: Add System Update application utilizing Topgrade

system_files/desktop/shared/usr/share/applications/system-update.desktop

@@ -0,0 +1,7 @@
+[Desktop Entry]
+Type=Application
+Name=System Update
+Icon=/usr/share/ublue-os/bazzite/update.svg
+Categories=Utility;
+Terminal=true
+Exec=/usr/bin/ujust update

system_files/desktop/silverblue/usr/etc/dconf/db/local.d/04-bazzite-folders

@@ -12,7 +12,7 @@ name='X-Pardus-Apps.directory'
 translate=true
 
 [org/gnome/desktop/app-folders/folders/Utilities]
-apps=['yafti.desktop', 'webapp-manager.desktop', 'tuned-gui.desktop', 'fish.desktop', 'tuned-gui.desktop', 'nvtop.desktop', 'yelp.desktop', 'btop.desktop', 'com.github.tchx84.Flatseal.desktop', 'io.github.flattool.Warehouse.desktop', 'it.mijorus.gearlever.desktop', 'com.mattjakeman.ExtensionManager.desktop', 'org.gnome.tweaks.desktop', 'com.github.GradienceTeam.Gradience', 'io.github.fastrizwaan.WineZGUI.desktop']
+apps=['yafti.desktop', 'system-update.desktop', 'webapp-manager.desktop', 'tuned-gui.desktop', 'fish.desktop', 'tuned-gui.desktop', 'nvtop.desktop', 'yelp.desktop', 'btop.desktop', 'com.github.tchx84.Flatseal.desktop', 'io.github.flattool.Warehouse.desktop', 'it.mijorus.gearlever.desktop', 'com.mattjakeman.ExtensionManager.desktop', 'org.gnome.tweaks.desktop', 'com.github.GradienceTeam.Gradience', 'io.github.fastrizwaan.WineZGUI.desktop']
 categories=['X-GNOME-Utilities']
 name='X-GNOME-Utilities.directory'
 translate=true