feat(definitions): declare unifiSiteManager integration and widget kinds

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

packages/ui/src/integration-select-grid/integration-grid-shared.ts

@@ -37,6 +37,7 @@ export const categoryTranslationKeys: Record<string, string> = {
   mediaLibrary: "integration.category.mediaLibrary",
   uptimeMonitoring: "integration.category.uptimeMonitoring",
   unifiOs: "integration.category.unifiOs",
+  unifiSiteManager: "integration.category.unifiSiteManager",
 };
 
 export interface IntegrationGridItem {