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

squashfs-root/usr/lib/pam.d/systemd-user

@@ -0,0 +1,13 @@
+# This file is part of systemd.
+#
+# Used by systemd --user instances.
+
+@include common-account
+
+session  required pam_selinux.so close
+session  required pam_selinux.so nottys open
+session  required pam_loginuid.so
+session  required pam_limits.so
+@include common-session-noninteractive
+session  optional pam_keyinit.so force revoke
+session  optional pam_systemd.so