* 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: David Ordás <3125580+davorpa@users.noreply.github.com>
Co-authored-by: Eric Hellman <eric@hellman.net>