feat: add more e2e tests for MPR and add test mode and extension (#3180)

* tests: add various e2e tests for MPR and measurements

wip

add cypress config

feat: add mode and extension for testing

add hp applied through search params

add MPR tests

apply review comments

add more e2e tests

update yarn lock

* fix unit tests failing

platform/viewer/cypress/integration/OHIFVideoDisplay.spec.js

@@ -1,15 +1,10 @@
-describe('OHIF Video Display', function () {
-  before(() => {
-    cy.openStudyInViewer(
-      '2.25.96975534054447904995905761963464388233'
-    );
-  });
-
-  beforeEach(function () {
+describe('OHIF Video Display', function() {
+  beforeEach(function() {
+    cy.openStudyInViewer('2.25.96975534054447904995905761963464388233');
     cy.resetViewport().wait(50);
   });
 
-  it('checks if series thumbnails are being displayed', function () {
+  it('checks if series thumbnails are being displayed', function() {
     cy.get('[data-cy="study-browser-thumbnail"]')
       .its('length')
       .should('be.gt', 1);