Docs: enable packages reference docs for 7-beta (#23953)

* added packages reference menu item.

* removed the draft flag.

* Updated docs by running script.

docs/sources/packages_api/ui/stringvalueeditor.md

@@ -5,7 +5,6 @@
 title = "StringValueEditor"
 keywords = ["grafana","documentation","sdk","@grafana/ui"]
 type = "docs"
-draft = true
 +++
 
 ## StringValueEditor variable