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/Http/ByteArrayContentHelper.cs

@@ -0,0 +1,27 @@
+// Copyright © WireMock.Net
+
+using System.Net.Http;
+using System.Net.Http.Headers;
+
+namespace WireMock.Http;
+
+internal static class ByteArrayContentHelper
+{
+    /// <summary>
+    /// Creates a ByteArrayContent object.
+    /// </summary>
+    /// <param name="content">The byte[] content (cannot be null)</param>
+    /// <param name="contentType">The ContentType (can be null)</param>
+    /// <returns>ByteArrayContent</returns>
+    internal static ByteArrayContent Create(byte[] content, MediaTypeHeaderValue? contentType)
+    {
+        var byteContent = new ByteArrayContent(content);
+        if (contentType != null)
+        {
+            byteContent.Headers.Remove(HttpKnownHeaderNames.ContentType);
+            byteContent.Headers.ContentType = contentType;
+        }
+
+        return byteContent;
+    }
+}