Create WireMock.Net.MimePart project (#1300)

* Create WireMock.Net.MimePart project

* .

* REFACTOR

* ILRepack

* --

* ...

* x

* x

* .

* fix

* public class MimePartMatcher

* shared

* min

* .

* <!--<DelaySign>true</DelaySign>-->

* Update README.md

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

src/WireMock.Net.Minimal/ResponseMessageBuilder.cs

@@ -0,0 +1,63 @@
+// Copyright © WireMock.Net
+
+using System;
+using System.Collections.Generic;
+using System.Net;
+using WireMock.Admin.Mappings;
+using WireMock.Constants;
+using WireMock.Http;
+using WireMock.Types;
+using WireMock.Util;
+
+namespace WireMock;
+
+internal static class ResponseMessageBuilder
+{
+    private static readonly IDictionary<string, WireMockList<string>> ContentTypeJsonHeaders = new Dictionary<string, WireMockList<string>>
+    {
+        { HttpKnownHeaderNames.ContentType, new WireMockList<string> { WireMockConstants.ContentTypeJson } }
+    };
+
+    internal static ResponseMessage Create(HttpStatusCode statusCode, string? status, Guid? guid = null)
+    {
+        return Create((int)statusCode, status, guid);
+    }
+
+    internal static ResponseMessage Create(int statusCode, string? status, Guid? guid = null)
+    {
+        return Create(statusCode, status, null, guid);
+    }
+
+    internal static ResponseMessage Create(int statusCode, string? status, string? error, Guid? guid = null)
+    {
+        var response = new ResponseMessage
+        {
+            StatusCode = statusCode,
+            Headers = ContentTypeJsonHeaders
+        };
+
+        if (status != null || error != null)
+        {
+            response.BodyData = new BodyData
+            {
+                DetectedBodyType = BodyType.Json,
+                BodyAsJson = new StatusModel
+                {
+                    Guid = guid,
+                    Status = status,
+                    Error = error
+                }
+            };
+        }
+
+        return response;
+    }
+
+    internal static ResponseMessage Create(HttpStatusCode statusCode)
+    {
+        return new ResponseMessage
+        {
+            StatusCode = statusCode
+        };
+    }
+}