add the next.js handbook translated by abdelhadi (#6774)

* add the next.js handbook translated by abdelhadi

* Update books/free-programming-books-ar.md

Co-authored-by: David Ordás <3125580+davorpa@users.noreply.github.com>

* Update free-programming-books-ar.md

Co-authored-by: David Ordás <3125580+davorpa@users.noreply.github.com>

books/free-programming-books-ar.md

@@ -55,7 +55,8 @@
 ### JavaScript
 
 * [تعلم JavaScript‏](https://itwadi.com/node/3002) - Cody Lindley, عبداللطيف ايمش (PDF)
-* [Eloquent Javascript (Second Edition)‏](https://rabahboudia.gitbooks.io/arabic-eloquent-js/) - Marijn Haverbeke, Rabah Boudia (gitbook) 
+* [سلسلة تعلم Next.js بالعربية](https://blog.abdelhadi.org/learn-nextjs-in-arabic/) - Flavio Copes, عبدالهادي الأندلسي
+* [Eloquent Javascript (Second Edition)‏](https://rabahboudia.gitbooks.io/arabic-eloquent-js/) - Marijn Haverbeke, Rabah Boudia (gitbook)
 
 
 ### Linux