refactor(onboarding): use separate onboarding controller (#14507)

Depends on: https://github.com/chatwoot/chatwoot/pull/14370

This PR creates a new onboarding controller, this allows more control
that the default account update API. Allowing us to spin tasks and
update details required specifically during the onboarding flow

app/javascript/dashboard/api/onboarding.js

@@ -0,0 +1,14 @@
+/* global axios */
+import ApiClient from './ApiClient';
+
+class OnboardingAPI extends ApiClient {
+  constructor() {
+    super('onboarding', { accountScoped: true });
+  }
+
+  update(data) {
+    return axios.patch(this.url, data);
+  }
+}
+
+export default new OnboardingAPI();