fix: homogenize markdown across files using markdownlint rules (#6988)

* chore: homogenize C# table of content anchor (`#c-sharp` to `#csharp`)

* format: homogenize c# category title

right markdown escape instead of use HTML entities

* lint: fix `MD012/no-multiple-blanks` rule

Multiple consecutive blank lines [Expected: 2; Actual: 3]

* lint: fix `MD039/no-space-in-links`

Spaces inside link text

* lint: fix `MD009/no-trailing-spaces` rule

Trailing spaces [Expected: 0 or 4; Actual: 1]
Trailing spaces [Expected: 0 or 4; Actual: 2]

* lint: fix `MD006/ul-start-left` rule

* format: remove extra spaces between note tokens

* spell: fix lint `MD044/proper-names` rule

- HTML
- JavaScript
- YouTube

* spell: normalize to the most common `Index` heading

* lint: fix `MD007/ul-indent` rule

Unordered list indentation [Expected: 4; Actual: 2]

* format: escape pipes `|` from resources text

addresses #5176

* add Hesham Asem courses about machine and deep learning and nlp

* Expand the name of nlp section

* Change the order

* Revert "spell: normalize to the most common `Index` heading"

This reverts commit 4d6a74e7d7.

Co-authored-by: AhmedElTabarani <eltabaraniahmed@gmail.com>

courses/free-courses-fr.md

@@ -10,9 +10,9 @@
 * [HTML and CSS](#html-and-css)
 * [Java](#java)
 * [JavaScript](#javascript)
-  * [jQuery](#jquery)
-  * [React](#react)
-  * [Vue.js](#vuejs)
+    * [jQuery](#jquery)
+    * [React](#react)
+    * [Vue.js](#vuejs)
 * [Linux](#linux)
 * [PHP](#php)
 * [Python](#python)
@@ -83,13 +83,13 @@
 * [Cours Java](https://www.youtube.com/playlist?list=PLrSOXFDHBtfHkq8dd3BbSaopVgRSYtgPv) - Formation Video
 
 
-### Javascript
+### JavaScript
 
 * [Apprendre à coder en JavaScript \| Cours complet (2020)](https://www.pierre-giraud.com/javascript-apprendre-coder-cours/) - Pierre Giraud
 * [Apprendre le JavaScript](https://www.youtube.com/playlist?list=PLjwdMgw5TTLVzD9Jq_WBd1crqDwXRn4cw) - Grafikart
 * [Cours JavaScript](https://www.youtube.com/playlist?list=PLrSOXFDHBtfGxf_PtXLu_OrjFKt4_dqB_) - Formation Video
 * [Déboguer son code JavaScript](https://www.youtube.com/playlist?list=PLjwdMgw5TTLWWXgsHpfCLHJ1Oq4YnE08e) - Grafikart
-* [Tutoriel de javascript moderne](https://fr.javascript.info) - javascript.info
+* [Le Tutoriel JavaScript Moderne](https://fr.javascript.info) - javascript.info
 * [TUTOS JS](https://www.youtube.com/playlist?list=PLEagTQfI6nPPVSKoYo2p8Cf8eijcyz5t9) - PrimFX