Two new projects, `ECMJobRunner.Application` and
`ECMJobRunner.Infrastructure`, were added to the solution file
(`ECM.JobRunner.sln`). Build configurations for these projects
were also added.
`ECMJobRunner.Application.csproj` targets both .NET Framework 4.8
and .NET 8.0, with properties such as `LangVersion`, `Nullable`,
and `PackageId` defined.
`ECMJobRunner.Infrastructure.csproj` also targets .NET Framework
4.8 and .NET 8.0. It includes conditional dependencies:
- For `net480`, it references `EntityFramework` 6.5.1.
- For `net8.0`, it references `Microsoft.EntityFrameworkCore`
and related packages (version 8.0.11).
