Nav: Add items to saved (#89908)

* App events: Add info notification type

* Revert state

* Use info alert

* Nav: Enable saving items

* Use local state

* Use RTK query

* Revert go.work

* Revert

* User-specific queries

* Add memo

* Fix base URL

* Switch to ids

* Fix memo

* Add codeowners

* Generate API

* Separate user prefs API

* Remove tag

* Update export

* Use feature toggle

.github/CODEOWNERS

@@ -448,6 +448,7 @@ playwright.config.ts @grafana/plugins-platform-frontend
 /public/app/features/transformers/timeSeriesTable/ @grafana/dataviz-squad @grafana/app-o11y-visualizations
 /public/app/features/users/ @grafana/access-squad
 /public/app/features/variables/ @grafana/dashboards-squad
+/public/app/features/preferences/ @grafana/grafana-frontend-platform
 /public/app/plugins/panel/alertlist/ @grafana/alerting-frontend
 /public/app/plugins/panel/annolist/ @grafana/grafana-frontend-platform
 /public/app/plugins/panel/barchart/ @grafana/dataviz-squad