Update + add fluent builder methods (#1042)

* Update some fluent builder methods

* fix

* sc

* ThenRespondWith

* // Copyright © WireMock.Net

src/WireMock.Net/Server/WireMockServer.Fluent.cs

@@ -0,0 +1,42 @@
+// Copyright © WireMock.Net
+
+using System;
+using JetBrains.Annotations;
+using Stef.Validation;
+using WireMock.Matchers.Request;
+using WireMock.RequestBuilders;
+
+namespace WireMock.Server;
+
+public partial class WireMockServer
+{
+    /// <summary>
+    /// Given
+    /// </summary>
+    /// <param name="requestMatcher">The request matcher.</param>
+    /// <param name="saveToFile">Optional boolean to indicate if this mapping should be saved as static mapping file.</param>
+    /// <returns>The <see cref="IRespondWithAProvider"/>.</returns>
+    [PublicAPI]
+    public IRespondWithAProvider Given(IRequestMatcher requestMatcher, bool saveToFile = false)
+    {
+        return _mappingBuilder.Given(requestMatcher, saveToFile);
+    }
+
+    /// <summary>
+    /// WhenRequest
+    /// </summary>
+    /// <param name="action">The action to use the fluent <see cref="IRequestBuilder"/>.</param>
+    /// <param name="saveToFile">Optional boolean to indicate if this mapping should be saved as static mapping file.</param>
+    /// <returns>The <see cref="IRespondWithAProvider"/>.</returns>
+    [PublicAPI]
+    public IRespondWithAProvider WhenRequest(Action<IRequestBuilder> action, bool saveToFile = false)
+    {
+        Guard.NotNull(action);
+
+        var requestBuilder = Request.Create();
+
+        action(requestBuilder);
+
+        return Given(requestBuilder, saveToFile);
+    }
+}