add dms-plugin-dev agent skill for plugin development (#2394)

.agents/skills/dms-plugin-dev/assets/templates/launcher/Settings.qml

@@ -0,0 +1,23 @@
+import QtQuick
+import qs.Common
+import qs.Widgets
+import qs.Modules.Plugins
+
+PluginSettings {
+    pluginId: "myLauncher"
+
+    StringSetting {
+        settingKey: "trigger"
+        label: "Trigger"
+        description: "Type this prefix in the launcher to activate the plugin"
+        placeholder: "#"
+        defaultValue: "#"
+    }
+
+    ToggleSetting {
+        settingKey: "noTrigger"
+        label: "Always Visible"
+        description: "Show items alongside regular apps without needing a trigger"
+        defaultValue: false
+    }
+}