Format JavaScript roadmap content (#2378)

* Adding information on QA SDLC Delivery Model node

* Update content/roadmaps/113-qa/content/101-qa-sdlc/readme.md

* Tweaking files in the Chrome Dev Tools section - JS roadmap

* Tweaking format on files from Memory Management - JS roadmap

* Fixed issue with one of the Free Contents - CommonJS readme

* Format tweak on Callback nodes - JS Roadmap

Co-authored-by: Kamran Ahmed <kamranahmed.se@gmail.com>

content/roadmaps/106-javascript/content/112-javascript-asynchronous-javascript/103-callbacks/100-callback-hell.md

@@ -2,4 +2,5 @@
 
 The callback hell is when we try to write asynchronous JavaScript in a way where execution happens visually from top to bottom, creating a code that has a pyramid shape with many }) at the end.
 
+<ResourceGroupTitle>Free Content</ResourceGroupTitle>
 <BadgeLink colorScheme='yellow' badgeText='Read' href='http://callbackhell.com/'>Callback Hell</BadgeLink>

content/roadmaps/106-javascript/content/112-javascript-asynchronous-javascript/103-callbacks/readme.md

@@ -2,5 +2,6 @@
 
 A callback function is a function passed into another function as an argument, which is then invoked inside the outer function to complete some kind of routine or action.
 
+<ResourceGroupTitle>Free Content</ResourceGroupTitle>
 <BadgeLink colorScheme='yellow' badgeText='Read' href='https://javascript.info/callbacks'>Callbacks in JavaScript</BadgeLink>
 <BadgeLink colorScheme='yellow' badgeText='Read' href='https://developer.mozilla.org/en-US/docs/Glossary/Callback_function'>Callback Functions</BadgeLink>