Moves the three open-format world-asset inspectors
(--info-wob, --info-wot, --info-woc) out of main.cpp into a
new cli_world_info.{hpp,cpp} module. Each prints a quick
structural summary (groups / portals / chunk counts /
triangles / bounds) without paying the full deserialization
cost a viewer would.
main.cpp shrinks by 144 lines (6,926 to 6,786). The
--copy-project handler that interleaved between --info-wob
and --info-wot stays inline -- it isn't an inspector and
belongs with project-mutation operations. All --json output
modes preserved.
