Enhance JSON serialization

Introduced improved encoding by setting the JavaScriptEncoder to unicode ranges and added necessary using directives. Additionally, the Serialize method is now appropriately marked to indicate its use of code that requires unreferenced code during linking, following best practices for code that may be subject to trimming in a .NET environment.

src/modules/Elsa.JavaScript/Services/JintJavaScriptEvaluator.cs

@@ -1,6 +1,9 @@
+using System.Diagnostics.CodeAnalysis;
+using System.Text.Encodings.Web;
 using System.Text.Json;
 using System.Text.Json.Serialization;
 using System.Text.RegularExpressions;
+using System.Text.Unicode;
 using Elsa.Expressions.Helpers;
 using Elsa.Expressions.Models;
 using Elsa.Extensions;
@@ -172,9 +175,13 @@ public class JintJavaScriptEvaluator : IJavaScriptEvaluator
         return result.ToObject();
     }
 
+    [RequiresUnreferencedCode("Calls System.Text.Json.JsonSerializer.Serialize<TValue>(TValue, JsonSerializerOptions)")]
     private static string Serialize(object value)
     {
-        var options = new JsonSerializerOptions();
+        var options = new JsonSerializerOptions
+        {
+            Encoder = JavaScriptEncoder.Create(UnicodeRanges.All)
+        };
         options.Converters.Add(new JsonStringEnumConverter());
 
         return JsonSerializer.Serialize(value, options);