feat: Convert all app files to JS

packages/backend/src/apps/twitter/common/get-current-user.js

@@ -0,0 +1,8 @@
+const getCurrentUser = async ($) => {
+  const response = await $.http.get('/2/users/me');
+  const currentUser = response.data.data;
+
+  return currentUser;
+};
+
+export default getCurrentUser;