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>

widgets/panel/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "llimphi-widget-panel"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+authors.workspace = true
+publish.workspace = true
+description = "llimphi-widget-panel — firma visual transversal: gradiente vertical casi imperceptible + hairline accent en el top edge. Helper paint_with + wrapper panel_view. La capa que vuelve reconocible al sistema sin cargar."
+
+[dependencies]
+llimphi-ui = { workspace = true }
+llimphi-theme = { workspace = true }