feat(PDF):Add PDF viewer (#2730)

Display DICOM encapsulated PDF documents in a PDF viewer.
Addressed the remaining PR comments, and am merging this.

extensions/dicom-video/src/viewports/OHIFCornerstoneVideoViewport.js

@@ -1,51 +1,36 @@
-import React, { useCallback, useContext, useEffect, useState } from 'react';
+import React, { useEffect, useState } from 'react';
 import PropTypes from 'prop-types';
-import cornerstoneTools from 'cornerstone-tools';
-import cornerstone from 'cornerstone-core';
-import CornerstoneViewport from 'react-cornerstone-viewport';
-import OHIF, { DicomMetadataStore, utils } from '@ohif/core';
-import {
-  Notification,
-  ViewportActionBar,
-  useViewportGrid,
-  useViewportDialog,
-} from '@ohif/ui';
-import { adapters } from 'dcmjs';
-import id from '../id';
-
 
 function OHIFCornerstoneVideoViewport({
-  children,
-  dataSource,
   displaySet,
-  viewportIndex,
-  servicesManager,
-  extensionManager,
 }) {
-  const {
-    DisplaySetService,
-    MeasurementService,
-    ToolBarService,
-  } = servicesManager.services;
   const { videoUrl } = displaySet;
   const mimeType = "video/mp4";
+  const [url, setUrl] = useState(null);
+  useEffect(async () => {
+    setUrl(await videoUrl);
+  });
 
   // Need to copies of the source to fix a firefox bug
   return (
     <div className="bg-primary-black w-full h-full">
       <video
-        src={videoUrl}
+        src={url}
         controls
         controlsList="nodownload"
         preload="auto"
         className="w-full h-full"
       >
-        <source src={videoUrl} type={mimeType} />
-        <source src={videoUrl} type={mimeType} />
-        Video src/type not supported: <a href={videoUrl}>{videoUrl} of type {mimeType}</a>
+        <source src={url} type={mimeType} />
+        <source src={url} type={mimeType} />
+        Video src/type not supported: <a href={url}>{url} of type {mimeType}</a>
       </video>
     </div>
   )
 }
 
+OHIFCornerstoneVideoViewport.propTypes = {
+  displaySet: PropTypes.object.isRequired,
+};
+
 export default OHIFCornerstoneVideoViewport;