feat(GoogleCloud): Initial commits to include the Healthcare API Adapter (#584)

* This is a React port of https://github.com/quantumsoftgroup/healthcare-api-adapter - It still needs some UI cleanup.

public/config/google.js

@@ -0,0 +1,26 @@
+window.config = {
+  routerBasename: '/',
+  relativeWebWorkerScriptsPath: '',
+  enableGoogleCloudAdapter: true,
+  servers: {
+    // This is an array, but we'll only use the first entry for now
+    dicomWeb: [],
+  },
+  // This is an array, but we'll only use the first entry for now
+  oidc: [
+    {
+      // ~ REQUIRED
+      // Authorization Server URL
+      authority: 'https://accounts.google.com',
+      client_id: '99926187585-6nli1cbsf1774f575vj9ti0j7h6ru711.apps.googleusercontent.com', //'YOURCLIENTID.apps.googleusercontent.com',
+      redirect_uri: 'http://localhost:5000/callback', // `OHIFStandaloneViewer.js`
+      response_type: 'id_token token',
+      scope: 'email profile openid https://www.googleapis.com/auth/cloudplatformprojects.readonly https://www.googleapis.com/auth/cloud-healthcare', // email profile openid
+      // ~ OPTIONAL
+      post_logout_redirect_uri: '/logout-redirect.html',
+      revoke_uri: 'https://accounts.google.com/o/oauth2/revoke?token=',
+      "automaticSilentRenew": true,
+      "revokeAccessTokenOnSignout": true,
+    },
+  ],
+}