draft item-system + elevation

packages/viewer/src/components/viewer/index.tsx

@@ -1,6 +1,6 @@
 'use client'
 
-import { CeilingSystem, SlabSystem, WallSystem } from '@pascal-app/core'
+import { CeilingSystem, ItemSystem, SlabSystem, WallSystem } from '@pascal-app/core'
 import { Bvh, Environment } from '@react-three/drei'
 import { Canvas, extend, type ThreeToJSXElements } from '@react-three/fiber'
 import * as THREE from 'three/webgpu'
@@ -41,6 +41,7 @@ const Viewer: React.FC<ViewerProps> = ({ children }) => {
       {/* Default Systems */}
       <LevelSystem />
       <CeilingSystem />
+      <ItemSystem />
       <SlabSystem />
       <WallSystem />
       <PostProcessing />