add: scan fragmented repair parts sequentially

src/utils/three/ExplodedModel.ts

@@ -1,6 +1,6 @@
 import * as THREE from "three";
 
-interface ExplodedPart {
+export interface ExplodedPart {
   object: THREE.Object3D;
   originalPosition: THREE.Vector3;
   targetPosition: THREE.Vector3;
@@ -31,6 +31,10 @@ export class ExplodedModel {
     this.targetProgress = split ? 1 : 0;
   }
 
+  getParts(): readonly ExplodedPart[] {
+    return this.parts;
+  }
+
   update(delta: number): void {
     const diff = this.targetProgress - this.progress;
     if (Math.abs(diff) < 0.001) {