Introduce .Net Aspire

[gterdem]

Introduces .Net Aspire

Updated the EShopOnABP solution with new solution folder aspire:

• eShopOnAbp.AppHost
• eShopOnAbp.ServiceDefaults
• Updated ABP to v8.1.3
• Updated Microsoft packages to 8.0.5
• Introduced service discovery. Removed every configuration with static url calls.

How to run

Currently I didn't integrate the docker images yet so the docker-compose.infrastructure is still required. Introduced start-containers.ps1 to start the required docker services.

• Run /start-containers.ps1.
• Run dotnet run /aspire/AppHost/eShopOnAbp.AppHost.csproj. (IDEs may behave differently, suggested way is to use dotnet tooling)

closes #243

[skoc10]

Before we merge this pr to the 'main' branch, we can deploy it from 'aspire' branch to 'azure kubernetes' and test it