Add Samples Aspire AppHost Project

[slang25]

Add an Aspire AppHost project (using Aspire 9 RC1), which:

• starts up both samples app projects
• adds the AWSSDK OTEL instrumentation
• adds the ASP.NET Core instrumentation
• adds a LocalStack docker container (something like this)

[martincostello]

Doing this will probably end up doing #874 too (or at least make it easier to do).

[slang25]

Doing this will probably end up doing #874 too (or at least make it easier to do).

easier to do for sure. To go back to our conversation, for SNS → SQS distributed tracing, we'd need to do some custom propagation to make it work. AWS Messaging do this: https://github.com/awslabs/aws-dotnet-messaging/tree/main/src/AWS.Messaging.Telemetry.OpenTelemetry

[martincostello]

Without looking too closely, looks like that could just be referenced and dropped in and it would Just Work™️. It just looks like OTel glue that isn't specifically tied to their messaging framework (unless that is adding some extra context to the traces).