feat: Added the ability to create Instagram channel (#11182)

This PR is part of https://github.com/chatwoot/chatwoot/pull/11054 to
make the review cycle easier.

app/javascript/dashboard/api/channel/instagramClient.js

@@ -0,0 +1,14 @@
+/* global axios */
+import ApiClient from '../ApiClient';
+
+class InstagramChannel extends ApiClient {
+  constructor() {
+    super('instagram', { accountScoped: true });
+  }
+
+  generateAuthorization(payload) {
+    return axios.post(`${this.url}/authorization`, payload);
+  }
+}
+
+export default new InstagramChannel();