Fix MapCommandName DI bug (#60)

* fix bug where command wasn't getting registered when MapCommandName(options) was called

Author: dotnetKyle

src/System.CommandLine.Minimal.SourceGenerator/CommandOptionsWriter.cs

@@ -47,7 +47,7 @@ public static class Configure{{binder.CommandNameTitleCase}}BuilderExtensions
                 );
                 // do not add the class to services if it's static
                 if (!binder.MethodIsStatic)
-                    sb.AppendLine($"            builder.Services.TryAddTransient<{binder.CommandOptionsName}>();");
+                    sb.AppendLine($"            builder.Services.TryAddTransient<{binder.FullClassName}>();");
                 sb.AppendLine(
                     $$"""
                                 {{binder.CommandOptionsName}} cliOptions = builder.TryRegisterCommandOptions<{{binder.CommandOptionsName}}>();