doc: add links to alternative versions of doc
Created by: chris--young
Each page of the api documentation should have links to other versions of the same page. This will make it easier to switch between the current "live" release at nodejs.org and LTS versions.
Fixes: https://github.com/nodejs/node/issues/10726
Checklist
-
make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
documentation is changed or added -
commit message follows commit guidelines
Affected core subsystem(s)
doc, tools