Restructure omni services and add Chatwoot research snapshot

research/chatwoot/app/javascript/widget/api/article.js

@@ -0,0 +1,7 @@
+import endPoints from 'widget/api/endPoints';
+import { API } from 'widget/helpers/axios';
+
+export const getMostReadArticles = async (slug, locale) => {
+  const urlData = endPoints.getMostReadArticles(slug, locale);
+  return API.get(urlData.url, { params: urlData.params });
+};