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/e2e-selectors/stringselector.md

@@ -0,0 +1,23 @@
++++
+# -----------------------------------------------------------------------
+# Do not edit this file. It is automatically generated by API Documenter.
+# -----------------------------------------------------------------------
+title = "StringSelector"
+keywords = ["grafana","documentation","sdk","@grafana/e2e-selectors"]
+type = "docs"
++++
+
+## StringSelector type
+
+### StringSelector type
+
+<b>Signature</b>
+
+```typescript
+export declare type StringSelector = string;
+```
+<b>Import</b>
+
+```typescript
+import { StringSelector } from '@grafana/e2e-selectors';
+```