add materials from @Codedog_ to the corresponding .md files

[nikitakoselev]

Please create files for the links mentioned by @Codedog_

Let's start with simple stuff, so don't spend too much time on design and so on.
Just do it :)

https://twitter.com/Codedog_/status/1586046249140387840?s=20&t=kjsmYEhxW6wItkZDLeypIA