Greetd: Add a greeter

DMSGreeter.qml

@@ -0,0 +1,25 @@
+import QtQuick
+import Quickshell
+import Quickshell.Wayland
+import Quickshell.Services.Greetd
+import qs.Common
+import "Modules/Greetd"
+
+ShellRoot {
+    id: root
+
+    WlSessionLock {
+        id: sessionLock
+        locked: true
+
+        onLockedChanged: {
+            if (!locked) {
+                console.log("Greetd session unlocked, exiting")
+            }
+        }
+
+        GreeterSurface {
+            lock: sessionLock
+        }
+    }
+}