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/Models/ProtoDefinitionData.cs

@@ -0,0 +1,39 @@
+// Copyright © WireMock.Net
+
+using System.Collections.Generic;
+using System.Linq;
+using Stef.Validation;
+
+namespace WireMock.Models;
+
+/// <summary>
+/// A placeholder class for Proto Definitions.
+/// </summary>
+public class ProtoDefinitionData
+{
+    private readonly IDictionary<string, string> _filenameMappedToProtoDefinition;
+
+    internal ProtoDefinitionData(IDictionary<string, string> filenameMappedToProtoDefinition)
+    {
+        _filenameMappedToProtoDefinition = filenameMappedToProtoDefinition;
+    }
+
+    /// <summary>
+    /// Get all the ProtoDefinitions.
+    /// Note: the main ProtoDefinition will be the first one in the list.
+    /// </summary>
+    /// <param name="mainProtoFilename">The main ProtoDefinition filename.</param>
+    public IReadOnlyList<string> ToList(string mainProtoFilename)
+    {
+        Guard.NotNullOrEmpty(mainProtoFilename);
+
+        if (!_filenameMappedToProtoDefinition.TryGetValue(mainProtoFilename, out var mainProtoDefinition))
+        {
+            throw new KeyNotFoundException($"The ProtoDefinition with filename '{mainProtoFilename}' was not found.");
+        }
+
+        var list = new List<string> { mainProtoDefinition };
+        list.AddRange(_filenameMappedToProtoDefinition.Where(kvp => kvp.Key != mainProtoFilename).Select(kvp => kvp.Value));
+        return list;
+    }
+}