Explain a bit about what pkg is and what it isn't, and clarify that
while Serenity kinda-sorta has the beginnings of a "package manager",
it's not exactly like a typical Linux package manager with binary
software.
By this point of time, we already have x86-64 support and have removed
i686 support too.
Since we are not the only OS project to remove 32-bit support entirely
and 64-bit computing is the norm for modern personal computers, there's
no need to explain this as it's obvious "why we are 64-bit only".
People are commonly asking about a package manager in
serenity. This patch adds an answer the FAQ, explaining
why there is no need for packages as well as different
possible ways to add or remove software installed on the
system.
This was hiding on the serenityos.org website previously, where not
many people found it. Let's put it in a more natural location, and
also make sure to link to it from the README.
