Moves all six world-asset interchange handlers (--export-wob-glb,
--export-wob-obj, --import-wob-obj, --export-whm-glb,
--export-whm-obj, --export-woc-obj) out of main.cpp into a new
cli_world_io.{hpp,cpp} module. WOB / WHM / WOC are our open
replacements for proprietary WMO / ADT-heightmap / ADT-collision
data; these are the bridge that lets the open formats round-trip
through Blender, MeshLab, Three.js, and the rest of the standard
3D toolchain.
main.cpp shrinks by 858 lines (8,997 to 8,140). The single-mesh
--import-obj handler stays inline for now -- it shadow-mirrors
cli_wom_io's --import-stl semantics and will move there next.
