Add ever-solidity in codewars

[kobzistiy]

Add ever-solidity in codewars https://www.codewars.com/.
Git: https://github.com/codewars/codewars.com

Add Сode runner: https://github.com/codewars/runner
Add Documentation: https://github.com/codewars/docs

[ilyar]

I think it would be rational to solve this #22 first of all. it’s more clear how to add it, and also there you will also have to make a runner, which I think will be reused