Windows quickstart instructions are out of date

[dangunter]

documentation page link

• the idaesx gui command isn't there anymore
• the pytest won't work since pytest isn't in non-dev installs

also:

• why are examples even in the quickstart?
• why is this so long and complicated looking?
  • I blame this "dan gunter" person 😃

[ksbeattie]

Part of this came from #1715