feat: add sleep timers

Signed-off-by: gwg313 <gwg313@pm.me>

common/gui/steam.nix

@@ -49,6 +49,7 @@
 
     environment.systemPackages = with pkgs; [
       protonup
+      steam-devices-udev-rules
       scanmem
     ];
   };

hosts/grymforge/sleep.nix

@@ -15,7 +15,7 @@
     description = "Timer to suspend PC at 10PM daily";
     wantedBy = [ "timers.target" ];
     timerConfig = {
-      OnCalendar = "daily 22:00";
+      OnCalendar = "*-*-* 22:00:00";
       Persistent = true;
     };
   };