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>

books/free-programming-books-cs.md

@@ -7,19 +7,19 @@
 * [HTML and CSS](#html-and-css)
 * [Java](#java)
 * [Language Agnostic](#language-agnostic)
-  * [Algoritmy a datové struktury](#algoritmy-a-datove-struktury)
-  * [Bezpečnost](#bezpecnost)
-  * [Matematika](#matematika)
-  * [Právo](#pravo)
-  * [Regulární výrazy](#regularni-vyrazy)
-  * [Sítě](#site)
+    * [Algoritmy a datové struktury](#algoritmy-a-datove-struktury)
+    * [Bezpečnost](#bezpecnost)
+    * [Matematika](#matematika)
+    * [Právo](#pravo)
+    * [Regulární výrazy](#regularni-vyrazy)
+    * [Sítě](#site)
 * [LaTeX](#latex)
 * [Linux](#linux)
   * [Distribuce](#distribuce)
 * [OpenSource](#opensource)
 * [PHP](#php)
 * [Python](#python)
-  * [Django](#django)
+    * [Django](#django)
 * [Ruby](#ruby)
 * [TeX](#tex)
 * [Unity](#unity)