create a kanshi service

modules/services/kanshi.nix

@@ -0,0 +1,27 @@
+#
+# System notifications
+#
+
+{ config, lib, pkgs, ... }:
+
+{
+    services.kanshi = {
+        enable = true;
+        profiles = {
+            undocked = {
+                outputs = [
+                    {
+                        criteria = "eDP-1";
+                    }
+                ];
+            };
+            docked = {
+                outputs = [
+                    {
+                        criteria = "HDMI-A-1"; status = "enable";
+                    }
+                ];
+            };
+        };
+    };
+}