init receiver UI web project using devexpress template

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/Services/ServiceExtensions.cs

@@ -0,0 +1,25 @@
+using Azure;
+using Azure.AI.OpenAI;
+using Microsoft.Extensions.AI;
+
+namespace EnvelopeGenerator.ReceiverUI.Web.Client.Utils
+{
+    public static class ServiceExtensions
+    {
+        // Demo AI services are rate limited and intended for demonstration purposes only.
+        // DevExpress does not offer a REST API and does not ship any built-in LLMs/SLMs.
+        // Use of demo credentials in production is strictly prohibited.
+        // Specify the Azure OpenAI endpoint, key, and deployment name in the 'appsettings.json' file.
+        public static void AddChatClient(this IServiceCollection services, string aiEndpoint, string aiKey, string deployment)
+        {
+            services.AddDevExpressAI();
+            services.AddScoped<IChatClient>(_ =>
+            {
+                var azureClient = new AzureOpenAIClient(new Uri(aiEndpoint), new AzureKeyCredential(aiKey));
+                return azureClient
+                    .GetChatClient(deployment)
+                    .AsIChatClient();
+            });
+        }
+    }
+}