Using 9.2's `WithUrl` for the first time

[afscrome]

Just tried out the new WithUrls option added in 9.2. Use case is I want to add a swagger url to my resource. We currently have a custom resource command to do this, but with the WithCommand we used being deprecated, seemed like moving to a native url was the best option.

First attempt was to try something like:

      var endpoint = builder.Resource.GetEndpoint(endpointName);
      builder.WithUrl($"{endpoint}/swagger", "swagger");

But this doesn't compile as the url has to be a string.

I found WithUrlForEndpoint which sort of works for what I want, however it replaces over the existing url, whereas I wanted the swagger link to be an additional link

      builder.WithUrlForEndpoint(endpointName, x =>
      {
         x.Url += "/swagger";
         x.DisplayText = "Swagger UI";
      });

There is WithUrls which creates an additional url, but now it has some strange UX whereby the Swagger url shows as soon as aspire starts up, but the http://loclhoast:1234 doesn't show up until the resource has finished waiting and actually starts

      builder.WithUrls(ctx => ctx.Urls.Add(new ResourceUrlAnnotation
         {
            Url = $"{endpoint.Url}/swagger",
            DisplayText = "Swagger UI",
         }));

1. Should there be an overload of WithUrl() that allows url to be a ReferenceExpression?
2. Is there a way to delay showing the url until the resource is actually started? (and should this be the default behavior)

[davidfowl]

cc @DamianEdwards

[DamianEdwards]

Yep I hit this myself last week when trying to create an additional URL for an endpoint. Right now, the logic only handles a single URL per endpoint. The simplest change is probably to fix that so that multiple URLs can be associated with an endpoint and then the endpoint's status will be used to determine when to show it. WithUrlForEndpoint() currently updates the URL associated with the endpoint so we should decide if we want to change that to make it additive, or add an overload that allows specifying the add or update behavior.