#8028454 Add /setup/blog binary selection screen for blog onboarding

Fixes Automattic/dotcom-forge#2141

Proposed Changes

• Adds binary selection page for blog onboarding

Testing Instructions

• http://calypso.localhost:3000/setup/blog
• Logged out should force a login or user creation before loading the page, both flows should return back to this screen
• Clicking on one of the buttons should move you to the editor, design picker, or login screen before hand as required.

Screenshot

• Mobile/small screen breakpoints need work
• WordPress logo missing?
• Figma icons needed