refactor: implement agreed upon changes based on discussion (#266)

[ata-nas]

Description

Based on discussion #266, implement the changes agreed upon there as seen in the task list below.

Tasklist

• create new class MathUtilities
• implement proposed change to create isPowerOfTwo(int) boolean check inside MathUtilities
• create new class Preconditions
• implement proposed change to create requirePowerOfTwo(int) strict precondition inside Preconditions
• implement proposed change to create isBlank(String) boolean check inside StringUtilities
• implement proposed change to move StringUtilities#requireNotBlank(String) to Preconditions

[AlfredoG87]

@ata-nas could you confirm if this is still pending or is already completed?

[ata-nas]

@ata-nas could you confirm if this is still pending or is already completed?

@AlfredoG87 this is pending, I will be including it in one of my PRs soon