feat: more work on getting console client sorted

src/AltGen.Console/Common/HostBuilderExtensions.cs

@@ -0,0 +1,11 @@
+namespace AltGen.Console.Common;
+
+static class HostBuilderExtensions
+{
+  public static CommandApp<GenerateCommand> BuildApp(this IHostBuilder builder)
+  {
+    var registrar = new TypeRegistrar(builder);
+    var app = new CommandApp<GenerateCommand>(registrar);
+    return app;
+  }
+}