Add "React in Patterns" from Krasimir Tsonev (#6016)

* add react in patterns from Krasimir Tsonev

* delete ('web') in react in patterns book

books/free-programming-books-langs.md

@@ -1250,6 +1250,7 @@ That section got so big, we decided to split it into its own file, the [BY SUBJE
 * [React Book, your beginner guide to React](https://github.com/softchris/react-book/) - Chris Noring
 * [React Enlightenment](https://www.reactenlightenment.com)
 * [React In-depth: An exploration of UI development](https://developmentarc.gitbooks.io/react-indepth/content/)
+* [React in patterns](https://krasimir.gitbooks.io/react-in-patterns/content) - Krasimir Tsonev
 * [React JS Notes for Professionals](https://goalkicker.com/ReactJSBook/) - Compiled from StackOverflow Documentation (PDF)
 * [React Primer Draft](https://github.com/mikechau/react-primer-draft)
 * [React Succinctly](https://www.syncfusion.com/ebooks/react-succinctly) - Samer Buna