feat: speak volume, world, and lens

The format's words were borrowed from its first subject: everything
was a "game", every ground a "map", every raster a "variant" --
and a city's dated revisions had to squat in vocabulary that was
never theirs. The concepts are now named for what they hold. A
library holds volumes: one .atlas file, one subject -- a game, a
planet, a city. A volume holds worlds: the distinct grounds a reader
stands on, which for a game are its maps and for a captured city are
its dated revisions. A world is seen through lenses: the rasters
that picture it -- alternate art, floors, elevation beside
photograph, a rendered basemap.

The rename runs through the wire format as version 2 -- manifest and
payload keys, worlds/ entries, the catalog, the serving routes --
with no compatibility shim, because every .atlas ever made came from
this archive and rebuilds in a breath. The crawl archive and the
mgdoc intermediate keep speaking MapGenie's game shape deliberately:
they mirror upstream, and the translation into Atlas's own words
happens where bundles are composed. Readers, workbench, and shell
follow: Volume, World and Lens pickers, /data/v/ serving, cartograph
volume pages, and the semantic conventions' world entity.

commit

8cc56a05cc42bab5b0ca3574913b7dff4154d30d

parent

b07f03b5ec06554be1a832f4ecbfd5d1cbf7fdc4

author

Dami <dami.etoile@gmail.com>