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.Shared/Matchers/IMimePartMatcher.cs

@@ -0,0 +1,37 @@
+// Copyright © WireMock.Net
+
+namespace WireMock.Matchers;
+
+/// <summary>
+/// MimePartMatcher
+/// </summary>
+/// <inheritdoc cref="IMatcher"/>
+public interface IMimePartMatcher : IMatcher
+{
+    /// <summary>
+    /// ContentType Matcher (image/png; name=image.png.)
+    /// </summary>
+    IStringMatcher? ContentTypeMatcher { get; }
+
+    /// <summary>
+    /// ContentDisposition Matcher (attachment; filename=image.png)
+    /// </summary>
+    IStringMatcher? ContentDispositionMatcher { get; }
+
+    /// <summary>
+    /// ContentTransferEncoding Matcher (base64)
+    /// </summary>
+    IStringMatcher? ContentTransferEncodingMatcher { get; }
+
+    /// <summary>
+    /// Content Matcher
+    /// </summary>
+    IMatcher? ContentMatcher { get; }
+
+    /// <summary>
+    /// Determines whether the specified MimePart is match.
+    /// </summary>
+    /// <param name="value">The MimePart.</param>
+    /// <returns>A value between 0.0 - 1.0 of the similarity.</returns>
+    public MatchResult IsMatch(object value);
+}