Azure Arc extension (#10400)

Adds an extension for Azure Arc with some initial Postgres pages

extensions/arc/src/ui/dashboards/postgres/postgresBackupPage.ts

@@ -0,0 +1,31 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import * as azdata from 'azdata';
+import * as loc from '../../../localizedConstants';
+import { IconPathHelper } from '../../../constants';
+import { PostgresDashboardPage } from './postgresDashboardPage';
+
+export class PostgresBackupPage extends PostgresDashboardPage {
+	protected get title(): string {
+		return loc.backup;
+	}
+
+	protected get id(): string {
+		return 'postgres-backup';
+	}
+
+	protected get icon(): { dark: string; light: string; } {
+		return IconPathHelper.backup;
+	}
+
+	protected get container(): azdata.Component {
+		return this.modelView.modelBuilder.text().withProperties<azdata.TextComponentProperties>({ value: loc.backup }).component();
+	}
+
+	protected get toolbarContainer(): azdata.ToolbarContainer {
+		return this.modelView.modelBuilder.toolbarContainer().component();
+	}
+}