Variable CONSTANTSConst

Frozen tuning constants, exposed as GeoLeaf.CONSTANTS.

⚠️ Do not purge the "unused" keys. Only DEFAULT_ZOOM, DEFAULT_CENTER and GEOJSON_MAX_ZOOM_ON_FIT have an internal reader; the other 10 have none, and a dead-code sweep flagged them as such (S5 backlog B.3). They are kept on purpose: all 13 are public API — documented key by key in packages/core/docs/constants/GeoLeaf_Constants_README.md, mounted at runtime by globals.core.ts, and re-exported by kernel-exports.ts (so they reach the generated dist/types/, the published type contract since ARCHI S6 removed the root index.d.ts).

Removing one is a silent breaking change: integrators read them through the namespace, and until S5 the public type was a bare index signature, so TypeScript would not have flagged a single call site. That declaration is now explicit — a removal at least breaks compilation on the consumer side.