Implements polymorphic data seeding mechanism for initial application setup
- Adds Mock repositories for Event, Booking, Customer, and Resource entities
- Creates DataSeeder to automatically populate IndexedDB from JSON sources
- Enhances index.ts initialization process with data seeding step
- Adds mock JSON data files for comprehensive test data
Improves offline-first and development testing capabilities
Introduces BaseEntityService and SyncPlugin to eliminate code duplication across entity services
Improves:
- Code reusability through inheritance and composition
- Sync infrastructure for all entity types
- Polymorphic sync status management
- Reduced boilerplate code by ~75%
Supports generic sync for Event, Booking, Customer, and Resource entities
