Priority notifications (#4798)

* new settings screen

* bring back the spinner

* add experimental language

* fix typo, change leading

* integrate priority notifications API

* update package

* use refetch instead of invalidateQueries

* fix read-after-write issue by polling for update

* add spinner for initial load

* rm onmutate, it's overcomplicated

* set error state eagerly

* Change language in description

Co-authored-by: Hailey <me@haileyok.com>

* prettier

* add `Toggle.Platform`

* extract out mutation hook + error state

* rm useless cache mutation

* disambiguate isError and isPending

* rm unused isError

---------

Co-authored-by: Samuel Newman <10959775+mozzius@users.noreply.github.com>
Co-authored-by: Hailey <me@haileyok.com>

src/routes.ts

@@ -5,6 +5,7 @@ export const router = new Router({
   Search: '/search',
   Feeds: '/feeds',
   Notifications: '/notifications',
+  NotificationsSettings: '/notifications/settings',
   Settings: '/settings',
   LanguageSettings: '/settings/language',
   Lists: '/lists',