[Proposal] Make able to write React in Typescript (#16210)

Co-authored-by: berlysia <berlysia@gmail.com>
Co-authored-by: fusagiko / takayamaki <takayamaki@users.noreply.github.com>

app/javascript/mastodon/initial_state.js

@@ -132,6 +132,7 @@ export const useBlurhash = getMeta('use_blurhash');
 export const usePendingItems = getMeta('use_pending_items');
 export const version = getMeta('version');
 export const languages = initialState?.languages;
+// @ts-expect-error
 export const statusPageUrl = getMeta('status_page_url');
 
 export default initialState;