chore: extend setup-test-e2e.js to check owner and repo title too (#283)

Author: JoshuaKGoldberg

script/setup-test-e2e.js

@@ -19,3 +19,15 @@ const newPackageJson = JSON.parse(
 
 assert.equal(newPackageJson.description, description);
 assert.equal(newPackageJson.name, repository);
+
+for (const search of [
+	`/JoshuaKGoldberg/`,
+	"template-typescript-node-package",
+]) {
+	const grepResult =
+		await $`grep --exclude script/setup-test-e2e.js --exclude-dir node_modules -i ${search} *.* **/*.*`;
+	assert.equal(
+		grepResult.stdout.trim(),
+		`README.md:> 💙 This package is based on [@JoshuaKGoldberg](https://github.com/JoshuaKGoldberg)'s [template-typescript-node-package](https://github.com/JoshuaKGoldberg/template-typescript-node-package).`
+	);
+}