fix: missing namespace

Author: Tom Brewer

Mythetech.Framework.WebAssembly/WebAssemblyRegistrationExtensions.cs

@@ -1,5 +1,6 @@
 using KristofferStrube.Blazor.FileSystemAccess;
 using Microsoft.Extensions.DependencyInjection;
+using Mythetech.Framework.Infrastructure;
 using Mythetech.Framework.Infrastructure.Files;
 using Mythetech.Framework.Infrastructure.Plugins;