Add option to sort pages in reverse

[dnnsjsk]

What problem will this feature address?

Reverse order of pages in navigation.

Describe the solution you'd like

meta.json

{
  "reverse": true
}

Describe alternatives you've considered

Sort manually, but would love just have the reverse option.

Additional context

Changelog entries would benefit from a reverse order option:

[fuma-nama]

Maybe can have a ... item but with reverse order and a different name like z...a