feat(dominium): backend GPUI + app — ventana viva del simulador

dominium-canvas-gpui: Element que pinta un RenderPlan como quads,
centrado en sus bounds (rgba→hsla, único crate que toca gpui).

app dominium: compone core→physics→iso→render-plan→canvas en una
ventana GPUI con bucle de simulación de fondo (~11 tps), panel de
estadísticas, controles play/pausa + re-sembrar, y re-siembra
automática al colapso poblacional.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Cargo.lock

@@ -3475,6 +3475,28 @@ dependencies = [
  "urlencoding",
 ]
 
+[[package]]
+name = "dominium"
+version = "0.1.0"
+dependencies = [
+ "dominium-canvas-gpui",
+ "dominium-core",
+ "dominium-iso",
+ "dominium-physics",
+ "dominium-render-plan",
+ "gpui",
+ "nahual-launcher",
+ "nahual-theme",
+]
+
+[[package]]
+name = "dominium-canvas-gpui"
+version = "0.1.0"
+dependencies = [
+ "dominium-render-plan",
+ "gpui",
+]
+
 [[package]]
 name = "dominium-core"
 version = "0.1.0"