add files for performance profiling dashboard

src/Umbraco.Web.UI.Client/src/backoffice/dashboards/performance-profiling/dashboard-performance-profiling.element.ts

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+import { UUITextStyles } from '@umbraco-ui/uui-css/lib';
+import { css, html, LitElement } from 'lit';
+import { customElement } from 'lit/decorators.js';
+
+@customElement('umb-dashboard-performance-profiling')
+export class UmbDashboardPerformanceProfilingElement extends LitElement {
+	static styles = [UUITextStyles, css``];
+
+	render() {
+		return html`
+			<uui-box>
+				<h1>Performance Profiling</h1>
+			</uui-box>
+		`;
+	}
+}
+
+export default UmbDashboardPerformanceProfilingElement;
+
+declare global {
+	interface HTMLElementTagNameMap {
+		'umb-dashboard-performance-profiling': UmbDashboardPerformanceProfilingElement;
+	}
+}

src/Umbraco.Web.UI.Client/src/backoffice/dashboards/performance-profiling/dashboard-performance-profiling.stories.ts

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+import { Meta, Story } from '@storybook/web-components';
+import { html } from 'lit-html';
+
+import type { UmbDashboardPerformanceProfilingElement } from './dashboard-performance-profiling.element';
+import './dashboard-performance-profiling.element';
+
+export default {
+	title: 'Dashboards/Performance Profiling',
+	component: 'umb-dashboard-performance-profiling',
+	id: 'umb-dashboard-performance-profiling',
+} as Meta;
+
+export const AAAOverview: Story<UmbDashboardPerformanceProfilingElement> = () =>
+	html` <umb-dashboard-performance-profiling></umb-dashboard-performance-profiling>`;
+AAAOverview.storyName = 'Overview';