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.config.ts

@@ -0,0 +1,40 @@
+import { defineConfig } from 'cypress';
+
+export default defineConfig({
+  chromeWebSecurity: false,
+  e2e: {
+    experimentalRunAllSpecs: true,
+    supportFile: 'cypress/support/index.js',
+    setupNodeEvents(on, config) {
+      on('before:browser:launch', (browser, launchOptions) => {
+        // `args` is an array of all the arguments that will
+        // be passed to browsers when it launches
+
+        console.log(launchOptions.args); // print all current args
+
+        console.log('***', browser.family, browser.name, '***');
+        if (browser.family === 'chromium' && browser.name !== 'electron') {
+          // auto open devtools
+          launchOptions.args.push('--enable-features=SharedArrayBuffer');
+        }
+
+        // whatever you return here becomes the launchOptions
+        return launchOptions;
+      });
+    },
+    baseUrl: 'http://localhost:3000',
+    waitForAnimations: true,
+    chromeWebSecurity: false,
+    defaultCommandTimeout: 10000,
+    requestTimeout: 10000,
+    responseTimeout: 10000,
+    specPattern: 'cypress/integration/**/*.spec.[jt]s',
+    projectId: '4oe38f',
+    video: false,
+    reporter: 'junit',
+    reporterOptions: {
+      mochaFile: 'cypress/results/test-output.xml',
+      toConsole: true,
+    },
+  },
+});