feat(Storybook): 'Playground' page for handy prototyping added

storybook/PagesModel.qml

@@ -1,6 +1,10 @@
 import QtQuick 2.14
 
 ListModel {
+    ListElement {
+         title: "Playground"
+         section: "Views"
+    }
     ListElement {
         title: "ProfileDialogView"
         section: "Views"

storybook/pages/PlaygroundPage.qml

@@ -0,0 +1,27 @@
+import QtQuick 2.15
+import QtQuick.Controls 2.15
+import QtQuick.Layouts 1.15
+import QtQml 2.15
+
+import StatusQ.Core 0.1
+import StatusQ.Core.Utils 0.1
+import StatusQ.Controls 0.1
+import StatusQ.Components 0.1
+import StatusQ.Core.Theme 0.1
+
+import Models 1.0
+import Storybook 1.0
+
+import SortFilterProxyModel 0.2
+
+import utils 1.0
+
+Item {
+    id: root
+
+    Label {
+        anchors.centerIn: parent
+        text: "This page is intentionally blank. Use it for quick prototyping" +
+              " but do not commit changes to that page."
+    }
+}