Fix a bunch of type errors and add a type-check to the github workflows (#837)

* Add yarn type-check

* Rename to yarn typecheck

* Fix a collection of type errors

* Add typecheck to automated tests

* add `dist` to exluded folders tsconfig

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Co-authored-by: Ansh Nanda <anshnanda10@gmail.com>

src/view/com/util/UserInfoText.tsx

@@ -70,7 +70,9 @@ export function UserInfoText({
         numberOfLines={1}
         href={`/profile/${profile.handle}`}
         text={`${prefix || ''}${sanitizeDisplayName(
-          profile[attr] || profile.handle,
+          typeof profile[attr] === 'string' && profile[attr]
+            ? (profile[attr] as string)
+            : profile.handle,
         )}`}
       />
     )