feat: implement Year Review feature with session management, item categorization, and real-time collaboration

src/components/year-review/index.ts

@@ -0,0 +1,5 @@
+export { YearReviewBoard } from './YearReviewBoard';
+export { YearReviewCard } from './YearReviewCard';
+export { YearReviewSection } from './YearReviewSection';
+export { YearReviewLiveWrapper } from './YearReviewLiveWrapper';
+export { YearReviewShareModal } from './YearReviewShareModal';