REFACTOR: Replace Dawn.Guard with Throw and refactor domain validations

[CesarD]

Detailed Description

Replace argument validation library Dawn.Guard with Throw library. Refactor corresponding domain validations and use the occasion to improve them.

Context

Because the library Dawn.Guard has been abandoned by its author, it became required to find an alternative that allows to do something similar and that also gets good maintenance support from its author.
For this purpose, the library Throw from Amichai Mantinband is a very good candidate since it's been conceived taking Dawn.Guard as reference but also allows some extra features.
It was considered the use of GuardClauses, but its syntax and features made it less appealing than Throw.
Also, since it will be needed to refactor all the current domain validations, we can use the occasion to improve them and add some more of them on places where there should be some validations.
This will also require to refactor unit tests and improve them to cover different scenarios that were currently not taken into consideration.