Add link identity generator

src/Spectre.Console/AnsiConsoleSettings.cs

@@ -18,6 +18,11 @@ namespace Spectre.Console
         /// </summary>
         public ColorSystemSupport ColorSystem { get; set; }
 
+        /// <summary>
+        /// Gets or sets the link identity generator.
+        /// </summary>
+        public ILinkIdentityGenerator? LinkIdentityGenerator { get; set; }
+
         /// <summary>
         /// Gets or sets the out buffer.
         /// </summary>