Docs: add bar/pie visualization Play link (#85898)
* Update index.md
* pie chart equivalent commit
* Updated titles to match dashboard title
---------
Co-authored-by: Isabel Matwawana <76437239+imatwawana@users.noreply.github.com>
(cherry picked from commit 623d4d580e)
Co-authored-by: David Allen <david.allen@grafana.com>