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/Util/DictionaryExtensions.cs

@@ -0,0 +1,34 @@
+// Copyright © WireMock.Net
+
+using System;
+using System.Collections.Generic;
+using Stef.Validation;
+
+namespace WireMock.Util;
+
+/// <summary>
+/// Some IDictionary Extensions
+/// </summary>
+public static class DictionaryExtensions
+{
+    /// <summary>
+    /// Loops the dictionary and executes the specified action.
+    /// </summary>
+    /// <typeparam name="TKey">The type of the key.</typeparam>
+    /// <typeparam name="TValue">The type of the value.</typeparam>
+    /// <param name="dictionary">The dictionary to loop (can be null).</param>
+    /// <param name="action">The action.</param>
+    public static void Loop<TKey, TValue>(this IDictionary<TKey, TValue>? dictionary, Action<TKey, TValue> action)
+        where TKey : notnull
+    {
+        Guard.NotNull(action);
+
+        if (dictionary != null)
+        {
+            foreach (var entry in dictionary)
+            {
+                action(entry.Key, entry.Value);
+            }
+        }
+    }
+}