buffering

[rafaqz]

These may be useful algorithms:

https://www.tandfonline.com/doi/full/10.1080/10095020.2012.747643

https://ieeexplore.ieee.org/abstract/document/9350239

[asinghvi17]

Clipper.jl also provides buffering, we could hook into that as a backend.

[asinghvi17]

So the way JTS does this is that it generates linework and then polygonizes that linework. We don't have that tooling in GO yet but it seems like that may be the simplest way to go about this.