fix(breadcrumb): allow null in useRef type for Vue compatibility

- Changed useRef type from HTMLElement to HTMLElement | null
- Fixes Vue TypeScript compilation error where null is not assignable to HTMLElement
- Maintains fix for Stencil Host wrapper issue

Author: sarahbrng

packages/components/src/components/breadcrumb/breadcrumb.lite.tsx

@@ -19,7 +19,7 @@ useDefaultProps<DBBreadcrumbProps>({
 });
 
 export default function DBBreadcrumb(props: DBBreadcrumbProps) {
-	const _ref = useRef<HTMLElement>(null);
+	const _ref = useRef<HTMLElement | null>(null);
 
 	const state = useStore<DBBreadcrumbState>({
 		isExpanded: false,