docs: rank the destructive generator as item 0

It was written up in 4.7 but never made the work order, which is exactly how it
stayed dangerous in the first place.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

examples/inter-app-api-showcase/apps/admin/test/smoke.test.ts

@@ -0,0 +1,15 @@
+import { expect, test } from "bun:test";
+import { parseOrThrow } from "@wrnexus/validation";
+import { contactSchema } from "../app/schemas/contact.ts";
+
+test("starter validation schema accepts a contact request", () => {
+  expect(
+    parseOrThrow(contactSchema, {
+      email: "hello@example.com",
+      message: "Hello from the generated application.",
+    }),
+  ).toEqual({
+    email: "hello@example.com",
+    message: "Hello from the generated application.",
+  });
+});