Split solution step by step

[JavierCane]

As commented out:

• master branch with the kata pending to solve (Example)
• 01-semantics branch with the kata solution just bringing domain semantics to our code. That is, with for loops and so on (Example)
• 02-idiomatic-csharp branch with the kata solution adding idiomatic usage of C# common traits. That is, Select expressions, usage of immutability, or whatever things C# promotes (Example)