Add HandlebarsSettings (#1271)

* Add HandlebarsSettings class

* DefaultAllowedHandlebarsHelpers

* HB - 2.5.0-preview-01

* readme

* fix

* readme

* Handlebars.Net.Helpers Version="2.5.0"

src/WireMock.Net/Settings/HandlebarsSettings.cs

@@ -0,0 +1,50 @@
+// Copyright © WireMock.Net
+
+using HandlebarsDotNet.Helpers.Enums;
+using JetBrains.Annotations;
+using WireMock.Types;
+
+namespace WireMock.Settings;
+
+/// <summary>
+/// HandlebarsSettings
+/// </summary>
+[PublicAPI]
+public class HandlebarsSettings
+{
+    internal static readonly Category[] DefaultAllowedHandlebarsHelpers =
+    [
+        Category.Boolean,
+        Category.Constants,
+        Category.DateTime,
+        Category.Enumerable,
+        Category.Humanizer,
+        Category.JsonPath,
+        Category.Math,
+        Category.Object,
+        Category.Random,
+        Category.Regex,
+        Category.String,
+        Category.Url,
+        Category.Xeger,
+        Category.XPath,
+        Category.Xslt
+    ];
+
+    /// <summary>
+    /// Defines the allowed custom HandlebarsHelpers which can be used. Possible values are:
+    /// - <see cref="CustomHandlebarsHelpers.None"/> (Default)
+    /// - <see cref="CustomHandlebarsHelpers.File"/>
+    /// - <see cref="CustomHandlebarsHelpers.All"/>
+    /// </summary>
+    [PublicAPI]
+    public CustomHandlebarsHelpers AllowedCustomHandlebarsHelpers { get; set; } = CustomHandlebarsHelpers.None;
+
+    /// <summary>
+    /// Defines the allowed HandlebarHelpers which can be used.
+    ///
+    /// By default, all categories except <see cref="Category.DynamicLinq"/> and <see cref="Category.Environment"/> are registered.
+    /// </summary>
+    [PublicAPI]
+    public Category[] AllowedHandlebarsHelpers { get; set; } = DefaultAllowedHandlebarsHelpers;
+}