feat: Add API module and Vuex store for Macros (#5603)

app/javascript/dashboard/api/macros.js

@@ -0,0 +1,16 @@
+/* global axios */
+import ApiClient from './ApiClient';
+
+class MacrosAPI extends ApiClient {
+  constructor() {
+    super('macros', { accountScoped: true });
+  }
+
+  executeMacro({ macroId, conversationIds }) {
+    return axios.post(`${this.url}/${macroId}/execute`, {
+      conversation_ids: conversationIds,
+    });
+  }
+}
+
+export default new MacrosAPI();