add installer as a page

src/Umbraco.Web.UI.Client/src/stories/installer-page.stories.ts

@@ -0,0 +1,13 @@
+import '../core/context/context-provider.element';
+import '../installer/installer.element';
+
+import { Meta } from '@storybook/web-components';
+import { html } from 'lit-html';
+
+export default {
+	title: 'Pages/Installer',
+	component: 'umb-installer',
+	id: 'installer-page',
+} as Meta;
+
+export const Installer = () => html`<umb-installer></umb-installer>`;