Add middleware file to nextjs-13 e2e tests to demonstrate failure

Author: andreiborza

dev-packages/e2e-tests/test-applications/nextjs-13/middleware.ts

@@ -0,0 +1,6 @@
+import { NextResponse } from 'next/server';
+
+export function middleware() {
+  // Basic middleware to ensure that the build works with edge runtime
+  return NextResponse.next();
+}