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/app/middleware/logger.ts

@@ -0,0 +1,8 @@
+import type { Middleware } from "@wrnexus/core";
+
+const logger: Middleware = async (ctx, next) => {
+  console.log(ctx.req.method, ctx.url.pathname);
+  return next();
+};
+
+export default logger;