Add MultiPart/MimePart Request Matcher (#981)

* wip

* .

* mm

* x

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* tests

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* more tests

* trans

* x

* win

* fix

* .

* tests

src/WireMock.Net.Abstractions/Admin/Mappings/MatcherModel.cs

@@ -39,14 +39,38 @@ public class MatcherModel
     /// <summary>
     /// The Operator to use when multiple patterns are defined. Optional.
     /// - null      = Same as "or".
-    /// - "or"      = Only one pattern should match.
+    /// - "or"      = Only one pattern is required to match.
     /// - "and"     = All patterns should match.
     /// - "average" = The average value from all patterns.
     /// </summary>
     public string? MatchOperator { get; set; }
 
+    #region JsonPartialMatcher and JsonPartialWildcardMatcher
     /// <summary>
-    /// Support Regex, only used for JsonPartialMatcher.
+    /// Support Regex.
     /// </summary>
     public bool? Regex { get; set; }
+    #endregion
+
+    #region MimePartMatcher
+    /// <summary>
+    /// ContentType Matcher (image/png; name=image.png)
+    /// </summary>
+    public MatcherModel? ContentTypeMatcher { get; set; }
+
+    /// <summary>
+    /// ContentDisposition Matcher (attachment; filename=image.png)
+    /// </summary>
+    public MatcherModel? ContentDispositionMatcher { get; set; }
+
+    /// <summary>
+    /// ContentTransferEncoding Matcher (base64)
+    /// </summary>
+    public MatcherModel? ContentTransferEncodingMatcher { get; set; }
+
+    /// <summary>
+    /// Content Matcher
+    /// </summary>
+    public MatcherModel? ContentMatcher { get; set; }
+    #endregion
 }