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-hal/README.md

@@ -0,0 +1,10 @@
+# llimphi-hal
+
+> Surface abstraction of [llimphi](../README.md). Multi-platform.
+
+`Surface` trait that abstracts window/framebuffer/canvas. Implementations: `winit` (Linux/macOS/Windows desktop), `android` (NDK), `wawa` (kernel framebuffer). The rest of the llimphi stack talks to `Surface`; moving Wayland → Wawa is swapping the HAL, not the scene tree.
+
+## Deps
+
+- `winit`, `raw-window-handle`
+- `serde`, `wgpu` (re-export so widgets can paint_with)