add solution items

refactor modules

refactor basket module

refactor solution

Add Shared.Messaging.csproj for async comunication sing masstransit

Add Shared.Contracts.csproj for Sync comunications

refactor Api

Add global usings, CQRS, and product features

Add EF Core design-time support and initial data seeding

Add Catalog module with EF Core and domain events

Add Docker support and PostgreSQL configuration

Add modules and global usings; remove empty files

Add DDD base classes and interfaces

➕ Add initial solution and projects for eShop app

Initial commit