Support standard byte order sorting

[adriangoransson]

This PR adds the sort_order property to sections that defaults to
lexical in order to keep backwards compatability and adds "standard" for
byte order sort.

This is useful if you have a list of non-english names and you want them
sorted correctly. My site is in Swedish and with natural sort åäö (our
last three letters of the alphabet) end up in the same position as aao
respectively.

IMPORTANT: Please do not create a Pull Request adding a new feature without discussing it first.
Didn't realize this was a requirement for feature additions (as well as requests).. Sorry!

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• Have you checked to ensure there aren't other open Pull Requests for the same update/change?

This PR is a continuation of #1315 which added natural sort order. Unfortunately that sort order wasn't perfect for my use case.

Code changes

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[Keats]

Thanks, that's definitely something of interest.

There was also Keats/tera#460 for sorting in Tera and I'm wondering how that works for non alphabetic languages.
I feel like it should probably be more a different sort_by value than a new configuration to keep things simple, unless we need to add a third order type.

What do you think of https://zola.discourse.group/t/remove-lighter-heavier-and-earlier-later/767/8 ?

[adriangoransson]

Thanks for taking the time to review!

I feel like it should probably be more a different sort_by value than a new configuration to keep things simple, unless we need to add a third order type.

If you mean something like sort_by = "title_standard" , I considered it but think having a sort order separate is more flexible if at some point order_by would support extra.*. Though I don't know if that would be of interest to have.

What do you think of https://zola.discourse.group/t/remove-lighter-heavier-and-earlier-later/767/8 ?

I make no use of next/prev references but greater/smaller sounds great and easy to use to me!

[Keats]

I've finally added that in the next branch: 5873e03
Started the commit from scratch as the code changed a lot since that PR.

Better late than never!

[adriangoransson]

Thanks for your hard work! It's appreciated. :)