Add terrain STL generators for 32mm fantasy dioramas, like chests, crates, chairs, weapon racks

[Copilot]

Adds programmatic STL generation for fantasy-themed diorama terrain (dungeons, towns, gaols, necromancer lairs) scaled for 32mm miniatures.

New primitives

• box(width, depth, height, center) — rectangular box primitive; foundation for all terrain geometry

New stl_generator.terrain module

Three terrain tile generators, all centred at origin and fully parameterised:

Function	Default size	Detail
dungeon_floor_tile()	50 × 50 × 5 mm	Regular flagstone grid with raised stones and mortar gaps
dungeon_wall_section()	50 × 40 × 8 mm	Solid wall with staggered ashlar courses embossed on the front face
cobblestone_street_tile()	50 × 50 × 5 mm	Staggered-row cobblestone pattern for town/street scenes

Stones are clipped to tile boundaries and all gap/relief/size parameters are exposed.

from stl_generator.terrain import dungeon_floor_tile, dungeon_wall_section, cobblestone_street_tile

dungeon_floor_tile().save("floor.stl")
dungeon_wall_section(width=80.0, height=60.0).save("wall.stl")
cobblestone_street_tile(stone_size=6.0).save("street.stl")

Tiles compose freely — lay a grid of dungeon_floor_tile instances with matching width/depth, back them with dungeon_wall_section walls, and place 32mm bases directly on top.

Original prompt

make STLs for terrain to go in small dioramas. there will be a fantasy theme, with dungeons, fantasy towns, gaols, necromancer lairs and so on. the scenery should be scaled for 32mm miniatures

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[srfraser]

The floor tiles are great but can we have more scatter terrain like chests, chairs, crates, floor torches