GeodesicArea method names differ from Area and ChamberlainDuquetteArea

[JosiahParry]

Taken from geoarrow/geoarrow-rs#969

The Area and ChamberlainDuquetteArea traits have methods with names signed_area() and unsigned_area() whereas the GeodesicArea trait has name area_signed() and area_unsigned().

It would be nice to have these renamed to be in line with the others.

[amir002001]

@frewsxcv can I do this as a first issue please?

[michaelkirk]

Sure @amir002001.

Please rename the methods in GeodesicArea to match the names used in the other two traits.

Leave the old methods with the existing spellings for a while, but add a deprecated attribute, so that we don't break any builds, and legacy users can find the new spelling.