Add static DI-based ReCClient initialization

Introduced dependency injection to the `ReCClient` class by adding `Microsoft.Extensions.DependencyInjection`. Added a static mechanism for creating and managing a `ReCClient` instance, including a `BuildStaticClient` method to configure the HTTP client and a `Static` property to retrieve the client. Implemented error handling to ensure proper initialization of the static service provider.

src/ReC.Client/ReCClient.cs

@@ -1,4 +1,6 @@
 using System.Text.Json;
+using Microsoft.Extensions.DependencyInjection;
+
 #if NETFRAMEWORK
 using System;
 using System.Net.Http;
@@ -42,5 +44,43 @@ namespace ReC.Client
             var resp = _http.PostAsync($"api/RecAction/invoke/{profileId}", content: null).GetAwaiter().GetResult();
             return resp.IsSuccessStatusCode;
         }
+
+        #region Static
+        private static readonly IServiceCollection Services = new ServiceCollection();
+
+        private static IServiceProvider
+#if nullable
+            ?
+#endif
+            ServiceProvider
+#if nullable
+            = null
+#endif
+            ;
+
+        public static void BuildStaticClient(string apiUri)
+        {
+            if(ServiceProvider != null)
+                throw new InvalidOperationException("Static ServiceProvider is already built.");
+
+            Services.AddHttpClient(ClientName, client =>
+            {
+                client.BaseAddress = new Uri(apiUri);
+            });
+            ServiceProvider = Services.BuildServiceProvider();
+        }
+
+        public static ReCClient Static 
+        { 
+            get
+            {
+                if (ServiceProvider == null)
+                    throw new InvalidOperationException("Static ServiceProvider is not built. Call BuildStaticClient first.");
+
+                var httpClientFactory = ServiceProvider.GetRequiredService<IHttpClientFactory>();
+                return new ReCClient(httpClientFactory);
+            } 
+        }
+        #endregion
     }
 }