- Created reusable BulkModeBanner component for bulk selection mode
- Displays selected item count with proper French pluralization
- Uses Kodo design system (cyan theme, consistent styling)
- Includes close button to exit bulk mode
- Accessibility: role="status", aria-live="polite", aria-atomic="true"
- Follows existing component patterns (similar to Alert component)
- Component returns null when inactive or no items selected
- Part of Action 8.4.1.1: Create bulk mode banner component
