Add grayscale

modules/graphics/grayscale.nix

@@ -0,0 +1,28 @@
+{ config, pkgs, ... }:
+
+let
+  user = "jonas";
+  uid = "1000";
+in {
+  systemd.user.services.hyprshade-toggle = {
+    description = "Toggle Hyprshade grayscale";
+    enable = true;
+    serviceConfig = {
+      Type = "oneshot";
+      ExecStart = "${pkgs.bash}/bin/bash /home/${user}/projects/scripts/shell/toggle_grayscale.sh";
+      Environment = ''
+        PATH=/home/jonas/.nix-profile/bin:/run/current-system/sw/bin:/usr/bin:${pkgs.hyprshade}/bin
+      '';
+    };
+  };
+
+  systemd.user.timers.hyprshade-toggle = {
+    description = "Run hyprshade-toggle every 5 minutes";
+    timerConfig = {
+      OnBootSec = "1min";
+      OnUnitActiveSec = "5min";
+      AccuracySec = "30s";
+    };
+    wantedBy = [ "timers.target" ];
+  };
+}