Yarp: Enable 301/302 redirects

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Is your feature request related to a problem? Please describe the problem.

I'm trying to have the yarp proxy that is configured redirect "/" to "/help/openapi" so that the help documentation on the help project is displayed by default on the root both for dev and deploy.

I can't find any way to do what you can easily do in a C# yarp project that does the 301 redirect.

### Describe the solution you'd like

proxy.WithConfiguration(yarp => yarp.AddRedirect("/", "/help/openapi")

### Additional context

This would then do a redirect automatically and the proxy wout then handle it because I have /help mapped ccordingly.