Load route components from ./routes folder
```
- routes
	- index.vue
	- foo.js
	- user/
		- [name].vue
```

This will be mapped to:

```js
[
	{
		path: '/',
		component: () => import('./routes/index.vue')
	},
	{
		path: '/foo',
		component: () => import('./routes/foo.js')
	},
	{
		path: '/user/:name',
		component: () => import('./routes/[name].vue')
	}
]
```

We can also load `routes/api/**/*.js` as server routes:

```js
// routes/api/user.js
exports.get = (req, res) => {
	res.json([{name: 'egoist'}])
}
```

Then GET `/api/user` will give you corresponding JSON response.

---

This will most likely implemented as an option:

```js
module.exports = {
	fsRoutes: true
}
```