feat: polyhedra zoo, Glyph rename, camera-wraps-scene, rasterizer + gallery overhaul

[apresmoi]

Summary

Big consolidated branch covering several connected workstreams since main.

Core / geometry

• Polyhedra zoo — 39 new polygon factories in @glyphcss/core covering the Platonic solids, Kepler-Poinsot stars, Archimedean / Catalan duals, prism / antiprism / bipyramid / trapezohedron families, and round primitives (sphere, cylinder, cone, torus, pyramid).
• Geometry registry — resolveGeometry(name, opts) lookup over 44 generators (used by <GlyphMesh geometry=\"…\"> in React / Vue / HTML).
• Cap winding fixes for the axially-symmetric helpers; cuboctahedron face-order fix.

API surface

• Renamed Glyphcss* → Glyph* across components, hooks, vanilla factories, and custom-element tags. No BC shims.
• <GlyphCamera> is the ergonomic default — an orthographic alias. Perspective remains explicit.
• Tree flipped to camera-wraps-scene in React, Vue, and the custom-element side.
• Geometry shortcut wired through <GlyphMesh geometry=\"…\"> in all three bindings.

Rasterizer

• Per-pixel barycentric depth + half-space inside test — fixes the angle-dependent silhouette "bread" artifact.
• Always-on backface culling.
• Always-on 4×4 Bayer ordered dithering between adjacent ramp glyphs.
• Opt-in Gouraud smooth shading with crease angle.

Examples scaffold

• New examples/{vanilla,html,react,vue}/{baked-shapes,solid-mesh,hotspot} apps demonstrating cross-path parity. All use autoSize: true.

Gallery

• Migrated website/src/glyph-runtime.ts to the public createGlyphScene API so library fixes propagate.
• Primitives bucket with all 44 generators in the sidebar.
• Hotspot positioning fixes (inline-block + isolation: isolate), reconnected line-height slider, fixed vertical drag direction.
• Removed axes / show-ground / light-helper toggles and dots / braille / runes glyph palettes.
• Wireframe N-gon fix — cube faces no longer render with fan-triangulation diagonals.
• CodePanel now updates when primitives are selected.

autoSize

• New scene option that auto-fits cols/rows to the host's box via ResizeObserver + monospace cell probe.

Docs

• Intro page demo now shows the apple mesh in solid mode (was a hand-coded wireframe cuboctahedron).
• New api/{react,vue,html}.mdx pages registered in the sidebar.

Test plan

• pnpm test — full vitest suite across core / glyphcss / react / vue
• pnpm build — packages + website (catches DTS / declaration breakage that vitest misses)
• /introduction renders the apple mesh in solid mode
• /gallery — switch between primitives, OBJ / GLB / VOX, wireframe + solid, all glyph palettes
• Wireframe of primitive-cube shows 12 edges only (no face diagonals)
• CodePanel updates when changing primitives; cylinder snippet includes upright rotation
• Each examples/<framework>/<scene>/ app boots and renders against the published API