Implement: Explode

[stuartlynn]

This should take a GeoSeries with multipart geometries (MultiPoint, MultiPolygon etc) and return a GeoSeries with each individual geometry in the multi collection as an individual geometry

Is this implemented in the Geo crate: No
GeoPandas equivalent: explode

Note this could be done by simply iterating through the series and then each Multi Geometry and appending the geometries to a new series.

One thing to figure out is how we want to handle this in the context of a GeoDataFrame. We would want the resulting geometries to have the same properties as their parent geometries.

In Geopandas, the result is a Series with a mutli-level index, we might not need this for polars