Introduces comprehensive data management system for calendar V2
- Adds IndexedDB storage with pluggable entity services
- Implements EventBus for decoupled event communication
- Creates data seeding mechanism for initial application setup
- Establishes sync and repository abstractions for flexible data handling
Introduces ScrollManager to synchronize time axis and header scrolling
Improves user experience by keeping time axis and header aligned during scrolling
Enables dynamic vertical and horizontal scroll tracking for calendar components
Introduces dependency injection container and composition root
Adds core services like DateService and NavigationAnimator
Simplifies CalendarOrchestrator with improved store handling
Implements mock stores and demo application for V2 calendar
