Describes an AWS Resilience Hub application.
See https://paws-r.github.io/docs/resiliencehub/describe_app.html for full documentation.
resiliencehub_describe_app(appArn)[required] The Amazon Resource Name (ARN) of the application. The format for this
ARN is: arn:partition:resiliencehub:region:account:app/app-id.
For more information about ARNs, see Amazon Resource Names (ARNs)
in the AWS General Reference.