feat(Notepad): add notepad desktop entry & IPC commands file handling

quickshell/Services/AppSearchService.qml

@@ -165,6 +165,16 @@ Singleton {
 
     readonly property string dmsLogoPath: Qt.resolvedUrl("../assets/danklogo2.svg")
 
+    // Prevent desktop entry duplicates from core apps
+    readonly property var builtInShadowDesktopIds: ["com.danklinux.dms.notepad"]
+
+    function isShadowedByCoreApp(app) {
+        if (!app)
+            return false;
+        const id = (app.id || "").replace(/\.desktop$/, "");
+        return builtInShadowDesktopIds.includes(id);
+    }
+
     readonly property var builtInPlugins: ({
             "dms_settings": {
                 id: "dms_settings",