feat: add various system and theme icons, configuration files, and support assets

squashfs-root/usr/lib/systemd/system/systemd-update-done.service

@@ -0,0 +1,23 @@
+#  SPDX-License-Identifier: LGPL-2.1-or-later
+#
+#  This file is part of systemd.
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 2.1 of the License, or
+#  (at your option) any later version.
+
+[Unit]
+Description=Update is Completed
+Documentation=man:systemd-update-done.service(8)
+DefaultDependencies=no
+Conflicts=shutdown.target
+After=local-fs.target
+Before=sysinit.target shutdown.target
+ConditionNeedsUpdate=|/etc
+ConditionNeedsUpdate=|/var
+
+[Service]
+Type=oneshot
+RemainAfterExit=yes
+ExecStart=/usr/lib/systemd/systemd-update-done