chat(build): fix broken installer on macOS (#2973)

Signed-off-by: Jared Van Bortel <jared@nomic.ai>

gpt4all-chat/qml/ToastManager.qml

@@ -0,0 +1,60 @@
+/*
+ * SPDX-License-Identifier: MIT
+ * Source: https://gist.github.com/jonmcclung/bae669101d17b103e94790341301c129
+ * Adapted from StackOverflow: http://stackoverflow.com/questions/26879266/make-toast-in-android-by-qml
+ */
+
+import QtQuick 2.0
+
+/**
+  * @brief Manager that creates Toasts dynamically
+  */
+ListView {
+    /**
+      * Public
+      */
+
+    /**
+      * @brief Shows a Toast
+      *
+      * @param {string} text Text to show
+      * @param {real} duration Duration to show in milliseconds, defaults to 3000
+      */
+    function show(text, duration=3000) {
+        model.insert(0, {text: text, duration: duration});
+    }
+
+    /**
+      * Private
+      */
+
+    id: root
+
+    z: Infinity
+    spacing: 5
+    anchors.fill: parent
+    anchors.bottomMargin: 10
+    verticalLayoutDirection: ListView.BottomToTop
+
+    interactive: false
+
+    displaced: Transition {
+        NumberAnimation {
+            properties: "y"
+            easing.type: Easing.InOutQuad
+        }
+    }
+    
+    delegate: Toast {
+        Component.onCompleted: {
+            if (typeof duration === "undefined") {
+                show(text);
+            }
+            else {
+                show(text, duration);
+            }
+        }
+    }
+
+    model: ListModel {id: model}
+}