add markdown-language-features to sqlops (#2338)

extensions/markdown-language-features/src/commands/refreshPreview.ts

@@ -0,0 +1,19 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import { Command } from '../commandManager';
+import { MarkdownPreviewManager } from '../features/previewManager';
+
+export class RefreshPreviewCommand implements Command {
+	public readonly id = 'markdown.preview.refresh';
+
+	public constructor(
+		private readonly webviewManager: MarkdownPreviewManager
+	) { }
+
+	public execute() {
+		this.webviewManager.refresh();
+	}
+}