[mapnik-polylabel] Replacement for mapbox-polylabel - #53409

If you feel able to do so, please consider adding a "license" field to the following files: 064 ports/mapbox-polylabel/vcpkg.json ports/mapnik-polylabel/vcpkg.json Valid values for the license field can be found at https://learn.microsoft.com/vcpkg/reference/vcpkg-json#license