Add transpose to Data.Array

[newlandsvalley]

Description of the change

It seems to be a good idea to add transpose to Data.Array given that we have it already in Data.List. This is discussed in #225. The implementation was actually provided by @JordanMartinez for which many thanks.

I've slotted the code towards the end of the section marked transformations.

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Checklist:

• Added the change to the changelog's "Unreleased" section
• Linked to issue transpose? #225
• Documentation style is basically the same as for Data.List.transpose
• Tests basically identical to those for Data.List.transpose

[JordanMartinez]

I'm guessing NonEmptyArray also doesn't have transpose? Maybe that should be added as well. But, that can be done in a separate PR if you don't feel like doing it here.

[JordanMartinez]

🏓 @garyb Can this get an approval?

[garyb]

👍

[newlandsvalley]

And NonEmptyList does not seem to have transpose either. I suspect the main difficulty might be in writing terse documentation because constructing a NonEmptyArray is so awkward. Maybe this is why this module is so lightly documented anyway. Could we get away with a statement that says something like behaviour as for Array.transpose?