Add support for point-in-polygon operations to "edit" command

[straup]

This will require specifying/building a "spatial" database at runtime.

• https://github.com/whosonfirst/go-whosonfirst-spatial
• https://millsfield.sfomuseum.org/blog/2022/12/19/pmtiles-pip/

Whatever is done, ensure that it is compatible and ultimately "shareable" with issue #24