refresh: stack al día (vello 0.7 / wgpu 27 / parley 0.6) + motor 3D voxel

Re-sincroniza las fuentes desde el monorepo (estaba en vello 0.5/wgpu 24 y con la
estructura vieja de eventloop) y suma el 3D:

- bump del workspace a vello 0.7 / wgpu 27 / parley 0.6, + accesskit 0.24 /
  accesskit_winit 0.33 / vello_hybrid 0.0.9.
- nuevos crates: llimphi-3d (voxels ray-march + mallas en un depth compartido,
  montable dentro de un View 2D vía set_viewport+scissor) y llimphi-voxel
  (world-gen, personajes, director de escenas) + shared/foreign-vox (puente .vox).
- README: sección "Not just 2D — a 3D voxel engine" + GIF (docs/llimphi_voxel.gif).
- excluido modules/allichay (arrastra deps fuera del alcance del front-door).
- cargo check --workspace: verde.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Sergio
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# llimphi
> Native UI framework: HAL · raster · layout · text · theme · ui — plus widgets and modules.
> Native UI framework — 2D **and** 3D: HAL · raster · layout · text · theme · ui · 3D voxel engine — plus widgets and modules.
`llimphi` is a sovereign, retained-mode UI framework with an Elm-style loop (`input → update → view → layout → raster → present`). Declarative pipeline over `vello` + `wgpu` + `taffy` + `parley`, with `Dark/Light/Aurora/Sunset` themes and a multi-platform HAL (Wayland · X11 · Win32 · Android · Wawa bare-metal). It powers a full Rust application suite; this repository is the framework extracted to stand on its own.
`llimphi` is a sovereign, retained-mode UI framework with an Elm-style loop (`input → update → view → layout → raster → present`). Declarative pipeline over `vello` 0.7 + `wgpu` 27 + `taffy` + `parley` 0.6, with `Dark/Light/Aurora/Sunset/Tawa` themes and a multi-platform HAL (Wayland · X11 · Win32 · Android · Wawa bare-metal). It powers a full Rust application suite; this repository is the framework extracted to stand on its own.
<p align="center">
<img src="docs/showreel.gif" alt="Llimphi showreel — real widgets (switch, slider, progress, segmented control, buttons, radial) animating live, then reflowing across layouts" width="900">
@@ -16,6 +16,18 @@
<sub>…and the entire Elm loop in ~124 LOC — <code>cargo run -p llimphi-ui --example counter</code></sub>
</p>
## Not just 2D — a 3D voxel engine
<p align="center">
<img src="docs/llimphi_voxel.gif" alt="A procedural voxel world (sand, cactus, carved rivers) orbiting — rendered by llimphi-3d" width="720">
<br>
<sub>a procedural voxel world orbiting — rendered headless by <code>llimphi-3d</code>, frame-by-frame</sub>
</p>
`llimphi-3d` is a **3D engine** on the same `wgpu`: it composes voxels (a GPU ray-march) and triangle meshes in one shared depth pass, with a keyframed cinema camera. It mounts into the ordinary 2D `View` tree through the GPU paint node (`set_viewport` + scissor), so a 3D viewport can live in a panel next to regular widgets — no second window, same Elm loop.
`llimphi-voxel` adds the *content* layer on top: procedural world-gen (`WorldRecipe`), articulated characters (age + animation clips) and a scripted scene **director**. The GIF above is one such world. (A full voxel **world studio** — edit worlds, cast characters, direct filmed scenes, export to video — is built on these in the wider project.)
**Usage manual:** [MANUAL.md](MANUAL.md) — full reference (Elm loop, `View<Msg>` DSL, the ~44 widgets and 10 modules, GPU path, gotchas) for humans and AI. Design rationale and roadmap: [SDD.md](SDD.md).
Philosophy: **widgets aren't designed against mockups; they're designed with what `vello` and `taffy` can do.**