Support for writing WKT with precision

[kylebarron]

It doesn't appear that there's currently a way to write WKT values with a given precision?

I'm implementing "display methods" in geoarrow so that Python users can have a better display in a terminal than

<geoarrow.rust.core._rust.MultiPolygonArray at 0x10a12e9a0>

and in this use case, having too many decimals of precision is distracting. E.g. shapely gives a "repr" of

It looks like this format! would have to be changed?

geozero/geozero/src/wkt/wkt_writer.rs

Line 104 in 52a4d2d

self.out.write_all(format!("{x} {y}").as_bytes())?;

Ref https://stackoverflow.com/a/49778870