inject the widget assembly into the IoC as we are going to need it further in

Hyperbar.Widget/WidgetExtensionInitializer.cs

@@ -0,0 +1,8 @@
+namespace Hyperbar.Widget;
+
+public class WidgetExtensionInitializer(IMediator mediator) :
+    IInitializer
+{
+    public async Task InitializeAsync() => 
+        await mediator.PublishAsync<Enumerate<WidgetExtension>>();
+}