qs: numerous performance optimizations

- ClippingRectangle usages
- Asynchronous loader usages
- Replace cava visualizers with shaders

quickshell/DMSShellIPC.qml

@@ -712,12 +712,13 @@ Item {
         target: "hypr"
     }
 
+    // ! TODO - remove for v1.6
     IpcHandler {
         function wallpaper(): string {
             const bar = root.getPreferredBar("clockButtonRef") || root.getPreferredBar();
             if (bar) {
                 bar.triggerWallpaperBrowser();
-                return "SUCCESS: Toggled wallpaper browser";
+                return "WARN; deprecated, use dms ipc call dash toggle wallpaper instead";
             }
             return "ERROR: Failed to toggle wallpaper browser";
         }