put shell in subdir, and add nix package

shell/notifications/Controller.qml

@@ -0,0 +1,98 @@
+pragma ComponentBehavior: Bound
+
+import QtQuick
+import QtQuick.Layouts
+import Quickshell
+import ".."
+
+Scope {
+    id: root
+
+    Connections {
+        target: Notifications.notificationServer
+
+        function onNotification(notification) {
+            notificationLoader.item.visible = true;
+        }
+    }
+
+    LazyLoader {
+        id: notificationLoader
+        loading: true
+
+        PanelWindow {
+            id: notificationWindow
+            property var visibleCount: {
+                let count = 0;
+
+                for (let i = 0; i < toastList.count; i++) {
+                    let item = toastList.itemAt(i);
+
+                    if (item && item.visible) {
+                        count++;
+                    }
+                }
+
+                return count;
+            }
+
+            onVisibleCountChanged: visible = visibleCount != 0
+
+            color: "transparent"
+            implicitWidth: 525
+            visible: false
+            exclusionMode: ExclusionMode.Normal
+
+            mask: Region {
+                item: notifLayout
+            }
+
+            anchors {
+                top: true
+                bottom: true
+                right: true
+            }
+
+            Text {
+                text: "length: " + notificationWindow.visibleCount
+            }
+
+            ColumnLayout {
+                id: notifLayout
+                spacing: 15
+
+                anchors {
+                    top: parent.top
+                    left: parent.left
+                    right: parent.right
+                    margins: 5
+                }
+
+                Repeater {
+                    id: toastList
+                    model: ScriptModel {
+                        values: Notifications.notificationServer.trackedNotifications.values.concat()
+                    }
+
+                    delegate: ActiveToast {
+                        id: toast
+                        required property var modelData
+                        notification: modelData
+
+                        Connections {
+                            target: toast
+
+                            function onExpired(notification) {
+                                toast.visible = false;
+                            }
+
+                            function onClosed(notification) {
+                                notification.dismiss();
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}