fix: homogenize authoring format and place (#7034)

* fix: homogenize authors format and place

- use colon as author separator (replaces `&`, `and`, `y`, `e`, `et`...)
- ensures is placed after resource title, not part of itself `title - author`
- `et al.` as special author/token to group many

* remove double comma

* fix: recover traducer role notations as `trad.:`

* detect and apply some `trad.:`s role anotation

* chore: `trad.:` to `trl.:`

Apply suggestion made by Eric at https://github.com/EbookFoundation/free-programming-books/pull/7034#discussion_r954014539

Co-authored-by: Eric Hellman <eric@hellman.net>

* Sort author - format

* fix: remove empty authors (dash is alone)

Used regex: `-\s+(\(|$)`

* format: change to `edt.:` role

Definition list at https://www.loc.gov/marc/relators/relaterm.html

Co-authored-by: Eric Hellman <eric@hellman.net>

books/free-programming-books-ar.md

@@ -45,7 +45,7 @@
 
 ### DB & DBMS
 
-* [تصميم قواعد البيانات](https://academy.hsoub.com/files/26-تصميم-قواعد-البيانات/) - Adrienne Watt & Nelson Eng، ترجمة أيمن طارق وعلا عباس (PDF)
+* [تصميم قواعد البيانات](https://academy.hsoub.com/files/26-تصميم-قواعد-البيانات/) - Adrienne Watt, Nelson Eng، ترجمة أيمن طارق وعلا عباس (PDF)
 
 
 ### HTML and CSS
@@ -77,7 +77,7 @@
 * [أوبنتو ببساطة](https://www.simplyubuntu.com) - Ahmed AbouZaid‏ (PDF)
 * [دفتر مدير دبيان](https://ar.debian-handbook.info) - Raphaël Hertzog, Roland Mas, MUHAMMET SAİT Muhammet Sait‏ (PDF, HTML)
 * [دليل إدارة خواديم أوبنتو 14.04](https://academy.hsoub.com/files/10-دليل-إدارة-خواديم-أوبنتو/) - Ubuntu documentation team, Abdullatif Eymash‏ (PDF)
-* [سطر أوامر لينكس](https://itwadi.com/node/2765) - Willam E. Shotts, Jr، ترجمة عبد اللطيف ايمش (PDF)
+* [سطر أوامر لينكس](https://itwadi.com/node/2765) - Willam E. Shotts Jr., ترجمة عبد اللطيف ايمش (PDF)
 
 
 ### Open Source Software