Hindi Internationalization (#1914)

* get basic hindi support to work

* get web app language switcher in

* Refactor i18n implementation and remove unused
code

* add missing strings

* add dropdowns and modals missing strings

* complete all hindi translations

* fix merge conflicts

* fix legeacy persisted state

* fix data in RecommendedFeeds

* fix lint

src/view/screens/PreferencesThreads.tsx

@@ -50,7 +50,7 @@ export function PreferencesThreads({navigation}: Props) {
         styles.container,
         isTabletOrDesktop && styles.desktopContainer,
       ]}>
-      <ViewHeader title="Thread Preferences" showOnDesktop />
+      <ViewHeader title={_(msg`Thread Preferences`)} showOnDesktop />
       <View
         style={[
           styles.titleSection,