Accessibility: Mark document-like outputs with role="document" for easier screen reader navigation.

fixes #93087

src/vs/workbench/contrib/extensions/browser/extensionEditor.ts

@@ -206,6 +206,7 @@ export class ExtensionEditor extends BaseEditor {
 		const root = append(parent, $('.extension-editor'));
 		root.tabIndex = 0; // this is required for the focus tracker on the editor
 		root.style.outline = 'none';
+		root.setAttribute('role', 'document');
 		const header = append(root, $('.header'));
 
 		const iconContainer = append(header, $('.icon-container'));

src/vs/workbench/contrib/welcome/page/browser/vs_code_welcome_page.ts

@@ -8,7 +8,7 @@ import { localize } from 'vs/nls';
 
 export default () => `
 <div class="welcomePageContainer">
-	<div class="welcomePage">
+	<div class="welcomePage" role="document">
 		<div class="title">
 			<h1 class="caption">${escape(localize('welcomePage.vscode', "Visual Studio Code"))}</h1>
 			<p class="subtitle detail">${escape(localize({ key: 'welcomePage.editingEvolved', comment: ['Shown as subtitle on the Welcome page.'] }, "Editing evolved"))}</p>