feat: start tinkering with adding a footer for the playerbar on the ApplicationWindow

desktop/qml/Root.qml

@@ -0,0 +1,21 @@
+import QtQuick
+import QtQuick.Controls as Controls
+import QtQuick.Layouts
+import org.kde.kirigami as Kirigami
+
+Kirigami.Page {
+    id: rootPage
+
+    ColumnLayout {
+        id: rootLayout
+
+        Layout.fillWidth: true
+
+        Controls.StackView {
+            id: rootStack
+
+            initialItem: HomePage {
+            }
+        }
+    }
+}