Restructure omni services and add Chatwoot research snapshot

research/chatwoot/app/javascript/dashboard/api/changelog.js

@@ -0,0 +1,16 @@
+import axios from 'axios';
+import ApiClient from './ApiClient';
+import { CHANGELOG_API_URL } from 'shared/constants/links';
+
+class ChangelogApi extends ApiClient {
+  constructor() {
+    super('changelog', { apiVersion: 'v1' });
+  }
+
+  // eslint-disable-next-line class-methods-use-this
+  fetchFromHub() {
+    return axios.get(CHANGELOG_API_URL);
+  }
+}
+
+export default new ChangelogApi();