Provide language and version switching capability within books
Created by: seanmadsen
The User Guide has multiple versions and multiple languages, all of which are listed on https://civicrm.org/documentation but many URLs for this guide point only to the latest English version at https://docs.civicrm.org/user/en/latest/. Once a reader arrives there, it is not apparent that they have the option to read the guide in other languages or for other versions.