Add ASP.NET Core middleware to run after Giraffe's middlewares

[64J0]

Description:

It would be nice to have a middleware that is able to run after the Giraffe's middleware so we can collect information from the response easily. Right now, Giraffe does not allow this behavior out of the box.

Some useful links:

• https://www.aaron-powell.com/posts/2019-05-27-implementing-basic-auth-on-saturn/
• https://learn.microsoft.com/en-us/aspnet/core/fundamentals/middleware/?view=aspnetcore-7.0
• https://giraffe.wiki/docs#giraffe-pipeline-vs-aspnet-core-pipeline