Review and update FAQ section of the living whitepaper

[led76marx]

We need to update the FAQ section of the living whitepaper:
https://developer.thenewboston.com/whitepaper/architecture#architecture-faq

Adding this content:
https://docs.google.com/document/d/1A8M55TrtFZF3kbQonj3CyectKPnTuG-H469QwERxhjM/edit#

Content must be approved and maybe improved by @manishram and @buckyroberts

[heshamwatany]

Add FAQ Content, and change the place from subsection to main section
to be under the additional features section