Introduce VSCode companion extension (#3917)

packages/vscode-ide-companion/src/extension.ts

@@ -0,0 +1,14 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import * as vscode from 'vscode';
+import { startIDEServer } from './ide-server';
+
+export async function activate(context: vscode.ExtensionContext) {
+  startIDEServer(context);
+}
+
+export function deactivate() {}