Moves the project-wide ADT-grid visualization handler
(--info-tilemap) out of main.cpp into a new
cli_tilemap.{hpp,cpp} module. Renders the WoW 64x64 tile
grid showing which tiles are claimed by which zones, with
collision detection (multiple zones claiming the same tile)
and per-zone glyph legend. Empty rows are skipped so the
output stays bounded for projects in one map corner.
main.cpp shrinks by 114 lines (3,433 to 3,319). --json
output mode preserved for CI pipelines.
