Add geoarrow-test subcrate with WKT data from geoarrow-data

[kylebarron]

Change list

• Includes copied in data from https://github.com/geoarrow/geoarrow-data/blob/3feaaa0b56758e2b5d7afc1c44c6555cb589d295/example/example_src.yaml and https://github.com/geoarrow/geoarrow-data/blob/3feaaa0b56758e2b5d7afc1c44c6555cb589d295/example/example_src_generated.yaml. By copying in the data, we can pass the WKT strings to the wkt! macro (wkt! macro for compile time checking of static WKT text georust/wkt#137)
• It includes all geometry types except for geometrycollection-nested, which we leave for the future.
• This PR just defines the test data; it doesn't add it to any tests yet.

cc @paleolimbot

[kylebarron]

Well, this doesn't actually work out as is because geoarrow-test depends on geoarrow-array, but we want to use this data from within the geoarrow-array tests, which would cause a circular dependency. So we'll have to move this test data into geoarrow-array after all

[kylebarron]

And we can't convert to geo_types anyways, because geo_types only supports 2D data and doesn't support empty points. So we need to update the included wkt strings to be f64 type, and return Wkt objects.