feat: enrichers, panel de ingest y menu contextual en el grafo

- Añade enricher.go + directorio enrichers/ para enriquecer entidades con fuentes externas.
- Nuevos componentes frontend: IngestPanel (panel de ingesta de datos) y NodeContextMenu (menu contextual sobre nodos del grafo).
- Retira SearchBar y lib/utils.ts; la busqueda se integra dentro de los paneles existentes.
- Ajusta tipos (types.go, types.ts, wailsjs/go) y theming (postcss + app.css + Mantine).
- Actualiza app.go y wails.json para exponer las nuevas capacidades.
- Añade directorio projects/ con estado inicial.
- Rebuild del frontend (dist actualizado).

frontend/package.json

@@ -9,24 +9,21 @@
     "preview": "vite preview --host"
   },
   "dependencies": {
-"@base-ui/react": "^1.3.0",
-    "@phosphor-icons/react": "^2.1.10",
-    "@radix-ui/react-checkbox": "^1.3.3",
-    "@radix-ui/react-slider": "^1.3.6",
+    "@mantine/core": "^9.0.0",
+    "@mantine/hooks": "^9.0.0",
+    "@mantine/notifications": "^9.0.0",
+    "@tabler/icons-react": "^3.41.1",
     "@tanstack/react-table": "^8.21.3",
-    "class-variance-authority": "^0.7.1",
-    "clsx": "^2.1.1",
-    "lucide-react": "^0.577.0",
     "react": "^19.2.4",
-    "react-dom": "^19.2.4",
-    "tailwind-merge": "^3.5.0"
+    "react-dom": "^19.2.4"
   },
   "devDependencies": {
-    "@tailwindcss/vite": "^4.2.2",
     "@types/react": "^19.2.14",
     "@types/react-dom": "^19.2.3",
     "@vitejs/plugin-react": "^6.0.0",
-    "tailwindcss": "^4.2.2",
+    "postcss": "^8.5.8",
+    "postcss-preset-mantine": "^1.18.0",
+    "postcss-simple-vars": "^7.0.1",
     "typescript": "~5.9.3",
     "vite": "^8.0.0"
   }