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/com/post-thread/PostThread.tsx

@@ -220,7 +220,7 @@ function PostThreadLoaded({
   const renderItem = React.useCallback(
     ({item, index}: {item: YieldedItem; index: number}) => {
       if (item === TOP_COMPONENT) {
-        return isTablet ? <ViewHeader title="Post" /> : null
+        return isTablet ? <ViewHeader title={_(msg`Post`)} /> : null
       } else if (item === PARENT_SPINNER) {
         return (
           <View style={styles.parentSpinner}>