Add support for a sorting order option.

[gus-nx]

Allows users to speciify the sorting order via a new option :
order=(asc|desc)
with asc by default (the current behavior)

[JeffFaer]

Awesome! Thanks for this improvement!

I'm happy to accept this as is, but I believe there might be a little bit more work to do in the future. Regexes support extracting multiple pieces from the current line. Users at some point might want to sort one "column" ascending and another "column" descending, so we might want this option to accept multiple values at some point in the future

Perhaps the behavior would be if there's only one sort order specified, use that for all columns, otherwise require that the number of sort orders matches the number of columns exactly

But we can leave that speculation to the future when someone actually asks for this behavior :)