refactor: move genre/studio/network calls into their own endpoints

this commit also adds a `useDiscover` hook to help with creating discover pages with less repeating
code

src/i18n/globalMessages.ts

@@ -23,6 +23,7 @@ const globalMessages = defineMessages({
   edit: 'Edit',
   experimental: 'Experimental',
   advanced: 'Advanced',
+  loading: 'Loading…',
 });
 
 export default globalMessages;