chore: mark router.options.ts as prod code

Author: danielroe

app/router.options.ts

@@ -1,4 +1,4 @@
-import type { RouterConfig } from '@nuxt/schema'
+import type { RouterConfig } from 'nuxt/schema'
 
 export default {
   scrollBehavior(to, _from, savedPosition) {

knip.ts

@@ -4,6 +4,7 @@ const config: KnipConfig = {
   workspaces: {
     '.': {
       entry: [
+        'app/router.options.ts!',
         'app/app.vue!',
         'app/error.vue!',
         'app/pages/**/*.vue!',