* add react course & tutorial

* chore: apply suggestions from code review

SC1: https://github.com/EbookFoundation/free-programming-books/pull/6313#discussion_r739754230
SC2: https://github.com/EbookFoundation/free-programming-books/pull/6313#discussion_r739754348

Resume: 
- Move `frwlr7uh0io` video due to playlist and title changes
- Using Youtube playlist where `kVV17VI9qTU` video belongs to.
- Change resource title according to that playlist name.
- Add the instructor (Irsyad) as well
- Recover blank line after list

* alphabetize

* remove orphan categories

* alphabetize

* alphabetize??

* one more try
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>
Co-authored-by: NEric Hellman <eric@hellman.net>