* Update free-courses-en.md

Added an awesome youtube video that explains self supervised learning in computer vision

* Update free-courses-en.md

updated order

* Update free-courses-en.md

* Update free-courses-en.md

Update playlist url

* Added free-programming-playgrounds for Solidity

* Added free-programming-interactive-tutorials-en for Solidity

* Update free-programming-interactive-tutorials-en.md

* Added free-programming-cheatsheets for Solidity

* Added free-courses-en for Blockchain

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* Update free-courses-en.md

* Update free-courses-en.md

* Update free-programming-cheatsheets.md

* Update free-programming-cheatsheets.md

* Update free-programming-cheatsheets.md

* Update free-courses-en.md

* Update free-programming-playgrounds.md

* Update free-programming-cheatsheets.md

* Update free-programming-interactive-tutorials-en.md

* Update free-programming-playgrounds.md

* Recover deleted Manoj Ramesh resource
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* Update more/free-programming-playgrounds.md
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* add creator
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Co-authored-by: NEric Hellman <eric@hellman.net>
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* R Basics - R Programming Language Introduction

* Update courses/free-courses-en.md
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* DSA course of kunal kushwaha added

* Update courses/free-courses-en.md
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* Reordering done
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* added course learning material from course category in english

* updated checks

* updated checks-2

* updated checks-3

* updated checks-5

* updated checks-6

* updated checks-4

* updated to playlists

* updated angular to playlists

* removed mooc-class central

Adds "Learn Git with Bitbucket Cloud"

In this Kotlin course, user will get familiarized with the language syntax, concepts, and libraries, as well as with the basics of OOP.

* Introduction To Python Programming

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* add kubernetes academy course

* fix new line after kubernetes academy course

* fix kubernetes academy course format

* fix kubernetes academy course with specific course

* Adding AI course in free-courses-en.md

Artificial Intelligence on Google Cloud Platform Youtube Playlist

* Update courses/free-courses-en.md

Adding instructor
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* refactor(courses): Add AI category

Add  `Artificial Intelligence` section suggested in https://github.com/EbookFoundation/free-programming-books/pull/5569#issuecomment-930197282

Resolves EbookFoundation/free-programming-books#5569
Locks Resolves EbookFoundation/free-programming-books#5569

* refactor(courses): Move `Elements of AI`

Moved to  `Artificial Intelligence` section suggested in https://github.com/EbookFoundation/free-programming-books/pull/5569#issuecomment-930197282

Resolves EbookFoundation/free-programming-books#5569
Locks Resolves EbookFoundation/free-programming-books#5569

* refactor(courses): Movings to `Artificial Intelligence`

Moves some resources related with topic found in `Misc` and `Data Science`
It consolidates this section 🚀

Improves EbookFoundation/free-programming-books#4579

* fix(courses): Give credits to instructor/platforms

* Update free-courses-en.md

* Update free-courses-en.md

* added with alphabetical order

* Update free-courses-en.md

* Added two Electronjs courses Resolves #5928

* updated links and category

* add svelte interactive tutorial

* add svelte courses

* add svelte to index

* move svelte resource to books listing

* move svelte resource to courses

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* Adding Database Systems free Course

Add youtube video's URL with Database Systems - Cornell University Course (SQL, NoSQL, Large-Scale Data Analysis) subject that created by Professor Immanuel Trummer, PhD and uploaded in the  freeCodeCamp.org youtube channel

* Update courses/free-courses-en.md with better name resources and simpler attributions

Implement the advice about name resources and complex attributions.
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* Update free-courses-en.md

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* Update free-courses-en.md

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* Update free-courses-en.md

* Adds Python course from NPTEL

* fixed hyperlink bug
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One of Udemy URL to the course is no longer accepting enrollments.

* Added course for Data Structures

* Added AI Course.

CS50’s Introduction to Artificial Intelligence with Python

* Fixed typo in course author's name.

* Updated course link to the latest version (2021)

This is CS50x

* update free-Courses-en

updated react native playlist

* update-free-courses-en

updated reactnative playlist

* Update courses/free-courses-en.md

Update courses/free-courses-en.md suggestion added
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* Update free-courses-en.md

* Update free-courses-en.md

* Add InfoSec 

Added Introduction to Information Security Course

* Add Full Stack Course

* Update free-courses-en.md

* Add Go tutorial

* Fix lint

* Fix lint

* Update courses/free-courses-en.md
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* add The Mechanics of Machine Learning

* change url for Introduction to statistical Learning

* change url for Mining of Massive Datasets

* add Mathematics for Machine Learning course

* add Made with ML in courses

* fix position of Made with ML

* remove trailing

* fix trailing \ in programming-books-langs

* add PDF indication to MMDS book

* add author and remove author links

* Added RxJS YouTube playlist in Hindi free course

* Added RxJS YouTube playlist in English free course

* Removed RxJS sub-category and merged course with JS category

* Removed RxJS sub-category and merged course with JS category

* Update 1 book URL in free-programming-books-id.md

Update URL for Pemrograman Kompetitif Dasar

* Add new MongoDB book at free-programming-books-langs.md

Added MongoDB Notes for Professionals

* Added Git for Professionals Tutorial at free-courses-en.md

Git for Professionals Tutorial - Tools & Concepts for Mastering Version Control with Git

* Added Git & GitHub tutorial playlist at free-courses-en.md

* Adding credit to the instructor

* Added Deep Learning with PyTorch course in free-courses-en.md

* Set theme jekyll-theme-cayman

* Revert "Set theme jekyll-theme-cayman"

This reverts commit 1287e0bb4a024af82471289579189ebcd81fdfce.

i have made changes that you want