Add helpers for query params fluent MappingModelBuilder (#1425)

* Add helpers for query params

* add example with query params

* add fluent helpers for WithHeaders and WithCookies

---------

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

src/WireMock.Net.Abstractions/BuilderExtensions/IListParamModelBuilder.cs

@@ -0,0 +1,17 @@
+// Copyright © WireMock.Net
+
+using System;
+
+namespace WireMock.Admin.Mappings;
+
+public partial class IListParamModelBuilder
+{
+    public IListParamModelBuilder WithParam(string name, Action<ArrayMatcherModelBuilder> action, bool rejectOnMatch = false)
+    {
+        return Add(paramBuilder => paramBuilder
+            .WithName(name)
+            .WithRejectOnMatch(rejectOnMatch)
+            .WithMatchers(matchersBuilder => action(matchersBuilder))
+        );
+    }
+}