Docs: New panel editor documentation (#24711)

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Co-authored-by: Dominik Prokop <dominik.prokop@grafana.com>

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Co-authored-by: Dominik Prokop <dominik.prokop@grafana.com>
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docs/sources/panels/visualizations/_index.md

@@ -4,4 +4,12 @@ type = "docs"
 [menu.docs]
 identifier = "visualizations"
 weight = 4
-+++
++++
+
+# Visualizations
+
+Grafana offers a variety of visualizations to suit different use cases. This section of the documentation lists the different visualizations available in Grafana and their unique display settings.
+
+The default options and their unique display options are described in the pages in this section. 
+
+You can add more panel types with [plugins]({{< relref "../../plugins/_index.md" >}}).