refactor: restructure to monorepo architecture

- Move core agent engine to packages/core/
- Add packages/types/ for shared TypeScript types
- Add packages/utils/ for utility functions
- Add apps/cli/ for command-line interface
- Add apps/gateway/ for NestJS WebSocket gateway
- Add apps/server/ for REST API server
- Restructure desktop app (electron/ → src/main/, src/preload/)
- Update pnpm workspace configuration
- Remove legacy src/ directory

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/web/package.json

@@ -13,10 +13,10 @@
     "@multica/sdk": "workspace:*",
     "@multica/store": "workspace:*",
     "@multica/ui": "workspace:*",
-    "uuid": "^13.0.0",
+    "uuid": "catalog:",
     "zustand": "catalog:",
-    "@hugeicons/core-free-icons": "^3.1.1",
-    "@hugeicons/react": "^1.1.4",
+    "@hugeicons/core-free-icons": "catalog:",
+    "@hugeicons/react": "catalog:",
     "next": "16.1.6",
     "next-themes": "^0.4.6",
     "react": "catalog:",
@@ -26,7 +26,7 @@
     "@types/node": "catalog:",
     "@types/react": "catalog:",
     "@types/react-dom": "catalog:",
-    "eslint": "^9",
+    "eslint": "catalog:",
     "eslint-config-next": "16.1.6",
     "typescript": "catalog:"
   }