* Add R section to cheetsheets

Add R Studio section to cheetsheets page

* Add link to RStudio official cheetsheets resources

Resources website: https://www.rstudio.com/resources/cheatsheets

* Add R cheetsheet: Data Wrangling with dplyr, tidyr

Data Wrangling with dplyr and tidyr cheetsheet (U.1/15) english
Public Url: https://www.rstudio.com/wp-content/uploads/2015/02/data-wrangling-cheatsheet.pdf

* Add R cheetsheet: Domar datos con dplyr y tidyr

Data Wrangling with dplyr and tidyr cheetsheet (U.1/15) spanish
Public Url: https://github.com/rstudio/cheatsheets/raw/master/translations/spanish/data-wrangling-cheatsheet_Spanish.pdf
Scrapped from: https://www.rstudio.com/resources/cheatsheets

* Add R cheetsheet: Domar datos con dplyr y tidyr

- Fix CI/CD errors.
- Data Wrangling with dplyr and tidyr cheetsheet (U.1/15) spanish
Public Url: https://github.com/rstudio/cheatsheets/raw/master/translations/spanish/data-wrangling-cheatsheet_Spanish.pdf
Scrapped from: https://www.rstudio.com/resources/cheatsheets

* Add R cheetsheet: Domar datos con dplyr y tidyr

- Fix CI/CD errors
- Data Wrangling with dplyr and tidyr cheetsheet (U.1/15) spanish
Public Url: https://github.com/rstudio/cheatsheets/raw/master/translations/spanish/data-wrangling-cheatsheet_Spanish.pdf
Scrapped from: https://www.rstudio.com/resources/cheatsheets

* Revert RStudio Data Wrangling cheatcheats (KISS)

- Keep It Simple / apply review suggestions. Thus, I remove "Data Wrangling" cheatsheets because it already are present in the RStudio portal that link points to.
- Fix grammar.

* ADD cheetsheet: Pandas Data Wrangling

Add the official Python Pandas Data Wrangling cheetsheet
Source: https://pandas.pydata.org/Pandas_Cheat_Sheet.pdf
Scrapped from: https://pandas.pydata.org/getting_started.html

* ADD cheetsheet: Data Wrangling with pandas

Fix CI- CD error: Alfabetical order

* Add jstrieb/sytems-programming-cheat-sheet

* Swap alphabetical order ("the" matters)

* Added the Artificial Intelligence section

* Added an empty line on top

* Added more empty lines!

* 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

Removal of "Learn Python in Y Minutes" from free-programming-books.md and addition to free-programming-cheatsheets.md
Co-authored-by: NEric Hellman <eric@hellman.net>

* C Cheat Sheet from #4896

* alphabetize

* added Python cheat sheets

Thanks for hosting this.
Just getting back into coding, and since I have been looking for resources for Python. 
I thought I would add what I have found. 

Happy hacking

* removed the spaces 

Hi sorry, it took so long to resolve this conflict. 
Actually took me a while to figure out how to do.

Thanks again so much for hosting this.

* alphabetize

* linespacing

* alphabetize
Co-authored-by: NEric Hellman <eric@hellman.net>

* Including cheatsheet for python

* alphabetize
Co-authored-by: NEric Hellman <eric@hellman.net>

* Updated C++ Cheat Sheet

* Added C Cheat Sheet

* Added Python Crash Course Cheatsheet(#4952)

Added Python Crash Course Cheatsheet

* Update free-programming-cheatsheets.md

* add link to cheatsheets

* fix ordering in courses-id

* Added git, CSS, HTML, and JS cheatsheets

* Update formatting and added to Table of Contents
Co-authored-by: Neric <eric@hellman.net>

* Added cheat sheet refence to swift and c#

* Modified section from PR feedback

* Added Python Regex Cheatsheet

* Added MySQL cheatsheet

* Added PostgreSQL cheatsheet

* Added SQL heading

* Fixed alphabetical order

* Fixed alphabetial ordering error

* free-programming-cheatsheets.md

I have used both of these links during College and they have saved me from hours of searching for help, just by going too these websites.

* Update free-programming-cheatsheets.md

* Added js regex cheatsheet

* Update free-programming-cheatsheets.md
Co-authored-by: NSeth <seth@elypia.org>
Co-authored-by: NSeth <seth@elypia.org>

* Update free-programming-cheatsheets.md

Added a Cheat Sheet for Kubernetes Beginners

* Update free-programming-cheatsheets.md

* Update free-programming-cheatsheets.md

Added Kubernetes Cheat Sheet with correct formatting

* Update free-programming-cheatsheets.md

* Update free-programming-cheatsheets.md

* Add MongoDB cheatsheet

I couldn't find this covered in an existing PR, linked cheatsheet is my current go-to.

* Add new section to Index

* Appease linter

docs: transfer links for cheatsheets from books page to new cheatsheets page and add css/js cheatsheets (#4557)

* docs: add links for cheatsheets

* docs: remove links for cheatsheets from books page