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/Extensions/StringExtensions.cs

@@ -0,0 +1,31 @@
+using System.Globalization;
+
+namespace WireMock.Extensions;
+
+internal static class StringExtensions
+{
+    // See https://andrewlock.net/why-is-string-gethashcode-different-each-time-i-run-my-program-in-net-core/
+    public static string GetDeterministicHashCodeAsString(this string str)
+    {
+        unchecked
+        {
+            int hash1 = (5381 << 16) + 5381;
+            int hash2 = hash1;
+
+            for (int i = 0; i < str.Length; i += 2)
+            {
+                hash1 = ((hash1 << 5) + hash1) ^ str[i];
+                if (i == str.Length - 1)
+                {
+                    break;
+                }
+
+                hash2 = ((hash2 << 5) + hash2) ^ str[i + 1];
+            }
+
+            int result = hash1 + hash2 * 1566083941;
+
+            return result.ToString(CultureInfo.InvariantCulture).Replace('-', '_');
+        }
+    }
+}