v1.2.0

New: rectangular zones without drawing

/shapeboard createbox <id> <x1> <z1> <x2> <z2> <y>

Two opposite corners plus the ceiling Y, and the zone exists: no marker blocks, no scanning. Corners can be given in any order. Everything else (metric, sidebar, top, hide/show) works exactly the same as scanned shapes.

Both readmes now clearly explain the three ways to define a zone: drawn outline (any shape), temporary outline (draw, create, remove the blocks), and createbox (rectangles).

Full Changelog: v1.1.0...v1.2.0