Popular v0.8.0

Added

• Setup wizard (scripts/setup.py): a stdlib, zero-dependency script that reads
  the shared question schema (setup-questions.json) and writes a site's config,
  a Code of Conduct seed page, a DECISIONS.md audit trail (what was decided,
  with handbook citations, and what is still open) and a .popular-setup.json
  answer record. Sugar, never a gate: skip every question and you get the clean
  starter config. Runs interactively or non-interactively (--answers file.json)
  for the agent and CI paths, detects Hugo vs Astro, and never overwrites an
  existing file without --force (--dry-run shows the diff). Works by
  placeholder substitution on templates, so it never parses or re-serializes
  your config.
• "Before you build" worksheet (/docs/before-you-build/): a docs page that
  renders the same question schema as a persistent checklist (decisions to
  settle first, then values to have ready), so the worksheet cannot drift from
  the wizard. The quick-start is rewritten around the wizard, and both repos'
  AGENTS.md gain a "Setting up a new site for a user" interview protocol.