feat: Refactor conveyor collider logic, enhance material spawning, and remove unused colliders component

app/src/modules/scene/scene.tsx

@@ -15,7 +15,7 @@ import { getUserData } from "../../functions/getUserData";
 import { useLoadingProgress, useSocketStore } from "../../store/builder/store";
 import { Color } from "three";
 import { Physics } from "@react-three/rapier";
-import Colliders from "./physics/colliders";
+import MaterialSpawner from "./physics/materialSpawner";
 
 export default function Scene({ layout }: { readonly layout: 'Main Layout' | 'Comparison Layout' }) {
     const map = useMemo(() => [
@@ -73,11 +73,20 @@ export default function Scene({ layout }: { readonly layout: 'Main Layout' | 'Co
             >
                 <Setup />
                 <Collaboration />
-                <Physics gravity={[0, -9.81, 0]} debug >
+                <Physics gravity={[0, -9.81, 0]} allowedLinearError={20} numSolverIterations={20} debug >
                     <Builder />
                     <Simulation />
 
-                    <Colliders />
+                    <MaterialSpawner
+                        position={[0, 3, 0]}
+                        spawnInterval={1000}
+                        spawnCount={50}
+                    />
+                    <MaterialSpawner
+                        position={[-21, 3, -8]}
+                        spawnInterval={1000}
+                        spawnCount={50}
+                    />
                 </Physics>
                 <Visualization />
             </Canvas>