feat: persist /var/lib/systemd entirely

Signed-off-by: Reputable2722 <153411261+Reputable2772@users.noreply.github.com>

Author: Reputable2772

System/Common/Misc/impermanence.nix

@@ -9,7 +9,7 @@
     directories = [
       "/var/log"
       "/var/lib/nixos"
-      "/var/lib/systemd/coredump"
+      "/var/lib/systemd"
 
       "/var/lib/bluetooth"
       "/etc/NetworkManager/system-connections"