feat(rechallenge): Retool challenge framework (#13666)

* feat(rechallenge): Retool challenge framework

* fix(code-storage): should use setContent not updateContent

* fix(rechallenge): fix context issue and temporal zone of death

* fix(rechallenge): Fix frame sources for user code

* fix(polyvinyl): Set should ignore source and transform should keep track of source

* fix(rechallenge): Missing return statement causing issues

client/frame-runner.js

@@ -58,6 +58,11 @@ document.addEventListener('DOMContentLoaded', function() {
         const newTest = { text, testString };
         let test;
         let __result;
+
+        // uncomment the following line to inspect
+        // the framerunner as it runs tests
+        // make sure the dev tools console is open
+        // debugger;
         try {
           /* eslint-disable no-eval */
           // eval test string to actual JavaScript