This commit deletes the entire Blazor WebAssembly frontend project, including all source code, components, DTOs, services, CSS, configuration files, static assets (such as favicon and icons), and the main HTML entry point. All references to `DbFirst.BlazorWasm` have been removed from the solution file, and associated dependencies like Bootstrap CSS and its source map are also deleted. This effectively removes the BlazorWasm application from the repository.
- Split `CatalogDto` into `CatalogReadDto` and `CatalogWriteDto` for clear separation of read/write operations in both backend and frontend.
- Updated API controllers, services, and AutoMapper profiles to use new DTOs; ensured audit fields are set in service layer.
- Enabled CORS in the API project to support Blazor WASM frontend.
- Added new Blazor WebAssembly project (`DbFirst.BlazorWasm`) with catalog management UI, API client, Bootstrap v5.1.0 styling, and configuration-driven API base URL.
- Included `bootstrap.min.css` and its source map for frontend styling and easier debugging.
- Updated solution file to include new project and support multiple build configurations.
- Result: improved API design, clean DTO separation, and a modern interactive frontend for catalog management.
