* alphabetize added language courses

Our linter had not been looking at these languages

* fix books files

* casts and more

* reorganize files

1. make it easier to find files
2. reduce scrolling to get to README on main view of repo

* remove tr.txt again

* Added the Arabic Eloquent JS

Added a link to the Arabic translation of Eloquent JS.

* Correcting the number of empty spaces

* Add arabic book

* mark link as PDF

* Add "Symfony 5: The Fast Track" book (en)

* Add "Symfony 5: The Fast Track" book (es)

* Add "Symfony 5: The Fast Track" book (de)

* Add "Symfony 5: The Fast Track" book (ar)

* Add "Symfony 5: The Fast Track" book (fa)

* Add "Symfony 5: The Fast Track" book (ja)

* Add "Symfony 5: The Fast Track" book (ru)

* Add "Symfony 5: The Fast Track" book (it)

* Add "Symfony 5: The Fast Track" book (nl)

* Add "Symfony 5: The Fast Track" book (pl)

* Add "Symfony 5: The Fast Track" book (pt_BR)

* Add "Symfony 5: The Fast Track" book (ro)

* Add "Symfony 5: The Fast Track" book (zh_CN)

* Add "Symfony 5: The Fast Track" book (fr)

* Remove redundant line breaks

* Fix the index

* Add Python Book (Arabic)

* Add CSS book (Arabic)

* Add HTML book (Arabic)

* Update ubuntu book’s link

Update ubuntu book’s link with the original source link

* Update UX book’s link

Update UX book’s link with the original source link

* Update broken links

* Small fix

* Update broken link

* add arabic language books

* 'fix broken link'

* 'fix alphabetical order'

* 'fix alphabetical order'

* 'fix alphabetical order and blank space'

* add book

* add book