addded README.md

refactor: enhance BasketUnitOfWork and CachedBasketRepository with caching logic

refactor: migrate to Unit of Work pattern for basket operations

implement BasketCheckoutIntegrationEventHandler to process basket checkout events and create orders

add project reference for Shared.Messaging in Ordering project

implement outbox pattern for basket checkout process and add outbox message processor

add checkout basket feature with DTO, endpoint, command handler, and database migration

remove TODO comment for cache removal in ProductPriceChangedIntegrationEventHandler

implement cache removal for updated item prices in shopping cart

add Ordering module with initial database setup and entity configurations

add TODO comment to ProductPriceChangedIntegrationEventHandler for cache removal

integrate Keycloak authentication and update endpoints for authorization

add RabbitMQ configuration and update MassTransit setup for messaging support

implement UpdateItemPriceInBasket command and handler to update item prices in the shopping cart

implement ProductPriceChangedIntegrationEventHandler and update ProductPriceChangedEventHandler to publish integration events