feat: llimphi standalone — framework UI soberano extraído del monorepo

Motor gráfico Llimphi como workspace independiente: bucle Elm
(input→update→view→layout→raster→present) sobre wgpu+vello+taffy+parley.
Núcleo (hal/raster/layout/text/ui/theme/surface/motion/icons) + ~40 widgets
+ módulos, sin dependencias al resto del monorepo. cargo check --workspace
pasa (64 crates). Puerta de entrada: cargo run -p llimphi-ui --example counter.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

llimphi-raster/README.md

@@ -0,0 +1,10 @@
+# llimphi-raster
+
+> Vello rasterizer + scene cache of [llimphi](../README.md).
+
+Wrapper over `vello`/`wgpu` with LRU cache of pre-rendered `Scene`s (for static layouts that don't change frame to frame). Antialiasing, clipping, blend modes. Works against the HAL's `Surface`.
+
+## Deps
+
+- [`llimphi-hal`](../llimphi-hal/README.md)
+- `vello`, `wgpu`, `peniko`, `kurbo`