fix: add create-next-app templates to eslintignore

This unused variable in a template was originally removed in order to prevent ESLint from throwing.

.eslintignore

@@ -17,6 +17,7 @@ packages/next-codemod/transforms/__tests__/**/*
 packages/next-codemod/**/*.js
 packages/next-codemod/**/*.d.ts
 packages/next-env/**/*.d.ts
+packages/create-next-app/templates/**
 test/integration/async-modules/**
 test/integration/eslint/**
 test-timings.json

packages/create-next-app/templates/typescript/pages/api/hello.ts

@@ -1,5 +1,5 @@
 // Next.js API route support: https://nextjs.org/docs/api-routes/introduction
 
-export default (res) => {
+export default (req, res) => {
   res.status(200).json({ name: 'John Doe' })
 }