Enable sort using alias

[waldyr]

Duplicates #766 and #1084 but this one have tests. All credit should be given to the PR authors.

[scarroll32]

This looks great @waldyr, any chance to add a note to the documentation?

[waldyr]

Sure. I just don't know what to add 😆

The example here is a a_or_b so it won't really work with sorting. Should I add another alias on the example and explain that you can use with sort_link or maybe you have something else in mind.

[scarroll32]

Should I add another alias on the example and explain that you can use with sort_link

@waldyr this would cover it, thank you.

[waldyr]

@seanfcarroll done. Let me know if it's enough

[scarroll32]

@waldyr that is great, thank you. I'll merge it once the CI has completed.