Moves the three zone & project metadata inspection handlers
out of main.cpp:
--info-zone (single zone.json print)
--info-zone-overview (high-level zone digest)
--info-project-overview (per-zone summary table for a project)
All three load zone.json via wowee::editor::ZoneManifest.
main.cpp drops 16,564 → 16,321 lines (-243). Behavior verified
by re-running --info-zone + --info-project-overview against
existing test zones.
