Move all impl to scrollable/

src/browser/scrollable/window.ts

@@ -0,0 +1,14 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+export type CodeWindow = Window & typeof globalThis & {
+	readonly vscodeWindowId: number;
+};
+
+export function ensureCodeWindow(targetWindow: Window, fallbackWindowId: number): asserts targetWindow is CodeWindow {
+}
+
+// eslint-disable-next-line no-restricted-globals
+export const mainWindow = (typeof window === 'object' ? window : globalThis) as CodeWindow;