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>

more/free-programming-cheatsheets.md

@@ -15,11 +15,11 @@
 * [IDE / Editors](#ide--editors)
 * [Java](#java)
 * [JavaScript](#javascript)
-  * [jQuery](#jquery)
-  * [Nest.js](#nestjs)
-  * [Nuxt.js](#nuxtjs)
-  * [React.js](#reactjs)
-  * [Vue.js](#vuejs)
+    * [jQuery](#jquery)
+    * [Nest.js](#nestjs)
+    * [Nuxt.js](#nuxtjs)
+    * [React.js](#reactjs)
+    * [Vue.js](#vuejs)
 * [Kotlin](#Kotlin)
 * [Kubernetes](#kubernetes)
 * [Language Translations](#language-translations)
@@ -97,7 +97,7 @@
 * [Docker Cheat Sheet (v1)](https://dockerlux.github.io/pdf/cheat-sheet.pdf) - Gildas Cuisinier, Docker Meetup Luxembourg (PDF)
 * [Docker Cheat Sheet (v2)](https://dockerlux.github.io/pdf/cheat-sheet-v2.pdf) - Gildas Cuisinier, Docker Meetup Luxembourg (PDF)
 * [Docker Cheatsheet: Docker commands that developers should know](https://vishnuch.tech/docker-cheatsheet) - Vishnu Chilamakuru (HTML)
-* [Docker CLI \& Dockerfile Cheat Sheet](https://web.archive.org/web/20210909015922/https://design.jboss.org/redhatdeveloper/marketing/docker_cheatsheet/cheatsheet/images/docker_cheatsheet_r3v2.pdf) - Bachir Chihani, Rafael Benevides, Red Hat Developers (PDF) *(:card_file_box: archived)* 
+* [Docker CLI \& Dockerfile Cheat Sheet](https://web.archive.org/web/20210909015922/https://design.jboss.org/redhatdeveloper/marketing/docker_cheatsheet/cheatsheet/images/docker_cheatsheet_r3v2.pdf) - Bachir Chihani, Rafael Benevides, Red Hat Developers (PDF) *(:card_file_box: archived)*
 * [Docker CLI cheatsheet](https://devhints.io/docker) - DevHints, Rico Santa Cruz (HTML)
 * [Docker Free Cheatsheet](https://cheatsheet.dennyzhang.com/cheatsheet-docker-a4) - Denny Zhang (HTML, PDF)
 * [Docker Security Cheat Sheet](https://cheatsheetseries.owasp.org/cheatsheets/Docker_Security_Cheat_Sheet.html) - OWASP Cheat Sheet Series
@@ -112,8 +112,8 @@
 * [Git Cheat Sheet](https://education.github.com/git-cheat-sheet-education.pdf) - GitHub (PDF)
 * [Git Cheat Sheet](https://about.gitlab.com/images/press/git-cheat-sheet.pdf) - GitLab (PDF)
 * [Git Cheat Sheet](http://git.jk.gs) - Jan Krüger (PDF, SVG)
-  * [Git Cheat Sheet](https://jan-krueger.net/wordpress/wp-content/uploads/2007/09/git-cheat-sheet.pdf) (PDF)
-  * [Git Cheat Sheet - extended](https://jan-krueger.net/wordpress/wp-content/uploads/2007/09/git-cheat-sheet-v2.zip) (PDF)
+    * [Git Cheat Sheet](https://jan-krueger.net/wordpress/wp-content/uploads/2007/09/git-cheat-sheet.pdf) (PDF)
+    * [Git Cheat Sheet - extended](https://jan-krueger.net/wordpress/wp-content/uploads/2007/09/git-cheat-sheet-v2.zip) (PDF)
 * [Git Cheat Sheet](https://programmingwithmosh.com/wp-content/uploads/2020/09/Git-Cheat-Sheet.pdf) - Moshfegh Hamedani (PDF)
 * [Git ściąga (pl)](https://training.github.com/downloads/pl/github-git-cheat-sheet/) - GitHub
 * [GitHub Cheat Sheet](https://github.com/tiimgreen/github-cheat-sheet) - Tim Green (Markdown)

more/free-programming-interactive-tutorials-en.md

@@ -17,16 +17,16 @@
 * [Go](#go)
 * [Haskell](#haskell)
 * [HTML and CSS](#html-and-css)
-  * [Bootstrap](#bootstrap)
+    * [Bootstrap](#bootstrap)
 * [Java](#java)
 * [JavaScript](#javascript)
-  * [AngularJS](#angularjs)
-  * [jQuery](#jquery)
-  * [React](#react)
-  * [Redux](#redux)
+    * [AngularJS](#angularjs)
+    * [jQuery](#jquery)
+    * [React](#react)
+    * [Redux](#redux)
 * [Kotlin](#kotlin)
 * [Language Agnostic](#language-agnostic)
-  * [Operating Systems](#operating-systems)
+    * [Operating Systems](#operating-systems)
 * [LaTeX](#latex)
 * [Lisp](#lisp)
 * [MATLAB](#matlab)
@@ -202,7 +202,7 @@
 * [ES6 Interactive Guide](http://stack.formidable.com/es6-interactive-guide/#/)
 * [Functional Programming in Javascript](https://github.com/ReactiveX/learnrx)
 * [JavaScript Algorithms and Data Structures Certification](https://www.freecodecamp.org/learn/javascript-algorithms-and-data-structures/) - freeCodeCamp
-* [Javascript interactive tutorial on CodeCademy](https://www.codecademy.com/learn/javascript)
+* [JavaScript interactive tutorial on CodeCademy](https://www.codecademy.com/learn/javascript)
 * [JavaScript interactive tutorial on CoderMania](http://www.codermania.com/javascript/lesson/1a/hello-world)
 * [JavaScript Tutorial](https://www.w3schools.com/js) - W3Schools
 * [JavaScript Tutorial](https://www.scaler.com/topics/javascript/) - Scaler Topics

more/free-programming-interactive-tutorials-ja.md

@@ -2,7 +2,7 @@
 
 * [HTML and CSS](#html-and-css)
 * [JavaScript](#javascript)
-  * [React](#react)
+    * [React](#react)
 * [Python](#python)
 
 

more/free-programming-interactive-tutorials-ru.md

@@ -44,5 +44,3 @@
 ### SQL
 
 * [SQL упражнения](https://www.sql-ex.ru/?Lang=0)
-
-

more/free-programming-playgrounds.md

@@ -19,7 +19,7 @@
 * [Ionic](#ionic)
 * [Java](#java)
 * [JavaScript](#javascript)
-  * [AngularJS](#angularjs)
+    * [AngularJS](#angularjs)
 * [Kotlin](#kotlin)
 * [Kubernetes](#kubernetes)
 * [.Net](#dotnet)
@@ -43,7 +43,7 @@
 * [Svelte](#svelte)
 * [Swift](#swift)
 * [TypeScript](#typescript)
-  * [Angular](#angular)
+    * [Angular](#angular)
 * [V](#v)