Add named pipes methods to Kestrel configuration loader

[JamesNK]

Background and Motivation

Named pipes were added in .NET 8. APIs for named pipes were added across Kestrel, but they were missed on KestrelConfigurationLoader. This proposal closes that gap.

Proposed API

namespace Microsoft.AspNetCore.Server.Kestrel;

public class KestrelConfigurationLoader
{
+    public KestrelConfigurationLoader NamedPipeEndpoint(string pipeName);
+    public KestrelConfigurationLoader NamedPipeEndpoint(string pipeName, Action<ListenOptions> configure);
}

Usage Examples

Alternative Designs

Risks

[dotnet-policy-service]

Thank you for submitting this for API review. This will be reviewed by @dotnet/aspnet-api-review at the next meeting of the ASP.NET Core API Review group. Please ensure you take a look at the API review process documentation and ensure that:

• The PR contains changes to the reference-assembly that describe the API change. Or, you have included a snippet of reference-assembly-style code that illustrates the API change.
• The PR describes the impact to users, both positive (useful new APIs) and negative (breaking changes).
• Someone is assigned to "champion" this change in the meeting, and they understand the impact and design of the change.

[amcasey]

API Approved!