Add OTEL tracing support for Wiremock + automatic OTEL for Aspire integration (#1418)

* Update aspire to 13.1 (examples + code)

Allows usage of aspire CLI which is very useful for dev in codespaces (for my next PR).

* Add OTEL support

* Initial PR feedback

* PR feedback

* PR feedback

* PR feedback

* Cleanup.

* Cleanup

* Fix

* Fix

* Rename stuff around to be more accurate

* PR feedback

* Update WireMock.Net.OpenTelemetry.csproj

Update <Authors>

* PR feedback parser

* PR feedback package versions

* Status code feedback.

* Update preprocessor directives to to Activity Tracing instead of OpenTelemetry. Is more descriptive.

* Add tests

* Improve tests

---------

Co-authored-by: Stef Heyenrath <Stef.Heyenrath@gmail.com>

src/WireMock.Net.OpenTelemetry/OpenTelemetryOptions.cs

@@ -0,0 +1,35 @@
+// Copyright © WireMock.Net
+
+using JetBrains.Annotations;
+
+namespace WireMock.OpenTelemetry;
+
+/// <summary>
+/// OpenTelemetry exporter configuration options for WireMock.Net.
+/// These options control the export of traces to an OTLP endpoint.
+/// For controlling what data is recorded in traces, configure ActivityTracingOptions in WireMockServerSettings.
+/// </summary>
+public class OpenTelemetryOptions
+{
+    /// <summary>
+    /// Gets or sets a value indicating whether to exclude admin interface requests from ASP.NET Core instrumentation.
+    /// Default is <c>true</c>.
+    /// </summary>
+    /// <remarks>
+    /// This controls the ASP.NET Core HTTP server instrumentation filter.
+    /// To also exclude admin requests from WireMock's own activity tracing,
+    /// set <c>ActivityTracingOptions.ExcludeAdminRequests</c> in WireMockServerSettings.
+    /// </remarks>
+    [PublicAPI]
+    public bool ExcludeAdminRequests { get; set; } = true;
+
+    /// <summary>
+    /// Gets or sets the OTLP exporter endpoint URL.
+    /// When set, traces will be exported to this endpoint using the OTLP protocol.
+    /// Example: "http://localhost:4317" for gRPC or "http://localhost:4318" for HTTP.
+    /// If not set, the OTLP exporter will use the <c>OTEL_EXPORTER_OTLP_ENDPOINT</c> environment variable,
+    /// or fall back to the default endpoint (<c>http://localhost:4317</c> for gRPC).
+    /// </summary>
+    [PublicAPI]
+    public string? OtlpExporterEndpoint { get; set; }
+}