Improve widget builder

Hyperbar.Windows.Contextual/ContextualWidgetBuilder.cs

@@ -0,0 +1,16 @@
+using Microsoft.Extensions.DependencyInjection;
+
+namespace Hyperbar.Widget.Contextual;
+
+public class ContextualWidgetBuilder :
+    IWidgetBuilder
+{
+    public void Create(IServiceCollection services) =>
+        WidgetBuilder.Config(services, config =>
+        {
+            config.Id = Guid.Parse("d3030852-8d4a-4fbb-9aa5-96dff3dfa06c");
+            config.Name = "Contextual commands";
+
+            services.AddWidgetTemplate<ContextualWidgetViewModel>();
+        });
+}

Hyperbar.Windows.Contextual/ContextualWidgetProvider.cs

@@ -1,11 +0,0 @@
-using Microsoft.Extensions.DependencyInjection;
-using Microsoft.Extensions.Hosting;
-
-namespace Hyperbar.Widget.Contextual;
-
-public class ContextualWidgetProvider :
-    IWidgetProvider
-{
-    public void Create(HostBuilderContext comtext, IServiceCollection services) => services
-            .AddWidgetTemplate<ContextualWidgetViewModel>();
-}