Introduced a new "Serilog" configuration section to enhance
logging control in the development environment. Set the
default logging level to "Debug" and added overrides for
specific namespaces ("Microsoft", "Microsoft.AspNetCore",
"Microsoft.EntityFrameworkCore", and "System") to "Warning".
Reorganized the solution structure to align with a layered architecture:
- Replaced `src` folder with `core`, `infrastructure`, and `presentation`.
- Moved projects to their respective folders.
- Added `DigitalData.MessagingService.Publisher.Abstraction` project.
- Removed `DigitalData.MessagingService.Client` project.
Updated project configurations and nesting in the solution file.
Added `appsettings.Secrets.json` with RabbitMQ and email account settings:
- RabbitMQ configuration includes hostname, port, credentials, and queue/exchange details.
- Email configuration includes SMTP server details and credentials.
