add date formats config

app/javascript/application.js

@@ -164,6 +164,7 @@ safeRegisterElement('template-builder', class extends HTMLElement {
     this.app = createApp(TemplateBuilder, {
       template,
       customFields: reactive(JSON.parse(this.dataset.customFields || '[]')),
+      dateFormats: JSON.parse(this.dataset.dateFormats || '[]'),
       dynamicDocuments: reactive(JSON.parse(this.dataset.dynamicDocuments || '[]')),
       backgroundColor: '#faf7f5',
       locale: this.dataset.locale,