reorganization to support SSR for component library in docusaurus

modes/longitudinal/src/index.js

@@ -1,5 +1,6 @@
 import toolbarButtons from './toolbarButtons.js';
-import { hotkeys } from '@ohif/core';
+import { utils } from '@ohif/ui';
+const { hotkeys } = utils;
 
 const ohif = {
   layout: 'org.ohif.default.layoutTemplateModule.viewerLayout',
@@ -18,7 +19,6 @@ const dicomsr = {
   viewport: 'org.ohif.dicom-sr.viewportModule.dicom-sr',
 };
 
-
 export default function mode({ modeConfiguration }) {
   return {
     // TODO: We're using this as a route segment