fix: add scrollMargin property since the IntersectionObserver has it

src/entities/Breadcrumb/model/store/scrollBreadcrumbsStore.test.ts

@@ -20,6 +20,7 @@ let mockObserverInstances: MockIntersectionObserver[] = [];
 class MockIntersectionObserver implements IntersectionObserver {
     root = null;
     rootMargin = '';
+    scrollMargin = '';
     thresholds: number[] = [];
     readonly callbacks: Array<(entries: IntersectionObserverEntry[], observer: IntersectionObserver) => void> = [];
     readonly observedElements = new Set<Element>();