feat: app launcher

Shell/Overlay.qml

@@ -4,6 +4,7 @@ import Quickshell.Wayland
 import Quickshell.Hyprland
 
 import "Windows/QuickSettings"
+import "Windows/AppLauncher"
 
 PanelWindow {
     id: overlay
@@ -70,4 +71,9 @@ PanelWindow {
         id: quickSettingsWindow
         manager: ShellStateManager
     }
+
+    AppLauncher {
+        id: appLauncherWindow
+        manager: ShellStateManager
+    }
 }