[accessibility] add rel="next" / rel="prev" to documentation links

[ysulyma]

Feature request

If possible, please add rel="prev"/rel="next" to links like this in the documentation:

I use an extension (https://github.com/tridactyl/tridactyl) to control my browser with the keyboard, and one very useful shortcut is [[ and ]] for "Go to prev/next page". This works on many documentation sites, but not yours. Adding rel="next" and rel="prev" will enable that. Thanks.

[linear]

NAN-2579 [accessibility] add rel="next" / rel="prev" to documentation links