* added the solidity programming language for writing smart contracts in Ethereum

* updated the spaces between the previous and the next sections

* Added few more resources for solidity development which includes step by step guide

* Fixed the alphabetical order

* removed the specific version based on the review comment

* removed the course in the solidity section to have it just books and guides

* add C++ Playground

* Remove trailing slash

* Add: Indonesia React Ebooks

* Add: Indonesia React JS Ebook

* Add: React JS Ebooks

* add: React JS Ebook (Indonesia)

* add: React JS untuk Pemula Ebook

* Update problem-sets-competitive-programming.md

* Update problem-sets-competitive-programming.md

* Update problem-sets-competitive-programming.md

* add a korean book links

* lint checked warning point fix

* lint checked warning point fix

* TOC fix

* TOC fix

* TOC fix

* add a python guide

* Alphabetical fix

* Update books/free-programming-books-ko.md
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

* empty index remove
Co-authored-by: Nhedykim <mzchedykim@lgupluspartners.co.kr>
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* Added Remix IDE to the Playgrounds file

A powerful Browser IDE for playing around with Solidity smart contracts!

* Update more/free-programming-playgrounds.md
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* whitespace
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* spaces
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>
Co-authored-by: NEric Hellman <eric@hellman.net>

* hacktoberfest Adding a new free Indonesian laravel e-book

* hacktoberfest Adding a new free Indonesian laravel e-book

* hacktoberfest Adding a new free Indonesian yii e-book

* hacktoberfest Adding a new free Indonesian php e-book

* hacktoberfest Adding a new free Indonesian php e-book

* hacktoberfest Adding a Author and eBook Type

* hacktoberfest Adding a Author and eBook Type

* fix author formatting
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* fix author formatting
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

* fix author formatting
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* remove extra line

* remove unused index items

* moved links to PHP
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Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

* correct bengali language code

* fix language code, replace spanish links with english

* lint

Adds "Uncomplicating Kubernetes" by Jeferson Fernando

* add reference to pt-BR on all CONTRIBUTING files
Signed-off-by: NRicardo H H Kojo <ricardokojo7@gmail.com>

* add CONTRIBUTING-pt_BR.md
Signed-off-by: NRicardo H H Kojo <ricardo.kojo.dev@gmail.com>

* Add free Javascript course in Spanish

* Update free-courses-es.md

Fixes to more pleasant form

* add react in patterns from Krasimir Tsonev

* delete ('web') in react in patterns book

* Update free-programming-books-ru.md

Translated one phrase.

* Update free-programming-books-ru.md

* geeksforgeeks.com is website, But their problem solving protal is https://practice.geeksforgeeks.org/

* Removed '/' from previous commit

* Added lisp books

* Added format for lisp books

* Added access note

* add kubernetes academy course

* fix new line after kubernetes academy course

* fix kubernetes academy course format

* fix kubernetes academy course with specific course

Fixed a mistake

Added Scapy cheatsheet

* Add wordpress course [PT-BR]

* Change order

Added polish version of CODE_OF_CONDUCT.md

* Added new resource for R language

* Update free-programming-books-langs.md

Added polish version of HOWTO.md file

* Belajar Membangun REST API dengan Spring Boot Bahasa Indonesia (Youtube)

* Update courses/free-courses-id.md

fix for add resource learn spring boot
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* revision add resource course spring

* Update courses/free-courses-id.md
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Co-authored-by: NEric Hellman <eric@hellman.net>

* Added Next.js resource

* Update free-programming-books-langs.md

Added another resource from free-courses-en.md

* Update free-programming-books-langs.md

* Update books/free-programming-books-langs.md
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Co-authored-by: NEric Hellman <eric@hellman.net>
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

* Code of conduct in French

* update Code of Conduct French

* Fix links in CODE_OF_CONDUCT-fr.md
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* fix syntax
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Co-authored-by: NEric Hellman <eric@hellman.net>

* Update free-programming-playgrounds.md

* Update free-programming-playgrounds.md

* Update free-programming-playgrounds.md

* Update free-programming-cheatsheets.md

* Update free-programming-cheatsheets.md

* Update more/free-programming-cheatsheets.md
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* Update more/free-programming-cheatsheets.md
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* Update more/free-programming-cheatsheets.md
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Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

* Added HTML5 Canvas Notes for Professionals

* Added Learning Java Language eBook

* Added Rip Tutorials in books/free-programming-books-subjects.md

* Update books/free-programming-books-langs.md
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Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

* 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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Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

* add pt-BR translation to CoC
Signed-off-by: NRicardo H H Kojo <ricardokojo7@gmail.com>

* fix text width
Signed-off-by: NRicardo H H Kojo <ricardokojo7@gmail.com>

* fix Contributor Covenant URL
Signed-off-by: NRicardo H H Kojo <ricardokojo7@gmail.com>

See https://github.com/EbookFoundation/free-programming-books/pull/5681#pullrequestreview-769522928

* 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