Add wallpaper transition effects, courtesy of @Ly-Sec

- Just copied the shaders from noctalia since they're pretty awesome

Services/NiriService.qml

@@ -29,6 +29,7 @@ Singleton {
     property string configValidationOutput: ""
     property bool hasInitialConnection: false
     property bool suppressConfigToast: true
+    property bool suppressNextConfigToast: false
 
     readonly property string socketPath: Quickshell.env("NIRI_SOCKET")
 
@@ -345,9 +346,10 @@ Singleton {
             if (ToastService.toastVisible && ToastService.currentLevel === ToastService.levelError) {
                 ToastService.hideToast()
             }
-            if (hasInitialConnection && !suppressConfigToast) {
+            if (hasInitialConnection && !suppressConfigToast && !suppressNextConfigToast) {
                 ToastService.showInfo("niri: config reloaded")
             }
+            suppressNextConfigToast = false
         }
 
         if (!hasInitialConnection) {
@@ -493,6 +495,10 @@ Singleton {
                     })
     }
 
+    function suppressNextToast() {
+        suppressNextConfigToast = true
+    }
+
     function findNiriWindow(toplevel) {
         if (!toplevel.appId) {
             return null