Add a dedicated Health Check assembly and/or NuGet package

[KrzysFR]

Looking at https://learn.microsoft.com/en-us/aspnet/core/host-and-deploy/health-checks?view=aspnetcore-7.0#distribute-a-health-check-library it is possible to write a health check for ASP.NET Core that comes as a library.

We should add a FoundationDBHealthCheck class that implements IHealthCheck.

This class could either be redistributed via its own assembly/package, OR could be part of the already existing FoundationDB.Client.DependencyInjection assembly ?

[KrzysFR]

The health check is included as part of the Aspire component work, see #127