V14: Segments configuration (#15812)

* Adding configuration options for segment settings

* Add "useSegments" to the document type configuration endpoint

* Adding additional configuration for creation of non-existing segments

src/Umbraco.Core/Configuration/Models/SegmentSettings.cs

@@ -0,0 +1,23 @@
+using System.ComponentModel;
+
+namespace Umbraco.Cms.Core.Configuration.Models;
+
+/// <summary>
+///     Typed configuration options for segment settings.
+/// </summary>
+public class SegmentSettings
+{
+    private const bool StaticEnabled = false;
+    private const bool StaticAllowCreation = true;
+
+    /// <summary>
+    ///     Gets or sets a value indicating whether the usage of segments is enabled.
+    /// </summary>
+    [DefaultValue(StaticEnabled)]
+    public bool Enabled { get; set; } = StaticEnabled;
+
+    /// <summary>
+    ///     Gets or sets a value indicating whether the creation of non-existing segments is allowed.
+    /// </summary>
+    public bool AllowCreation { get; set; } = StaticAllowCreation;
+}