fix: Service consistency typing (#3309)

* Use more consistent type/structure for services

* Fix restoring SR so the tests described work

* One more typed service

* Added types for the Cornerstone library

* Couple more type fixes

extensions/default/src/CustomizeableContextMenu/index.ts

@@ -1,5 +1,5 @@
 import ContextMenuController from './ContextMenuController';
-import ContextMenuItemsBuilder from './ContextMenuItemsBuilder';
+import * as ContextMenuItemsBuilder from './ContextMenuItemsBuilder';
 import defaultContextMenu from './defaultContextMenu';
 import * as CustomizeableContextMenuTypes from './types';