More flexibility to define which z/x/y tiles to be generated

[Zia-]

Hello,

It's a request for an additional functionality that will hugely impact the overall time it takes for Tippecanoe to generate all tiles in a Slurm Cluster.

At the minute, we only have two options:

1. Generate all tiles for a given zoom level using something like this: tippecanoe -e ~path/vectorDir ~path/pixel.geojson -Z12 -z12 -d19 -pk -pf -F
2. Generate a specific tile like this: tippecanoe -e ~path/vectorDir ~path/pixel.geojson -R4/4/7 -d19 -pk -pf -F

However, if there is an option like this - -R4-5/4-5/7-8 it will let me split the tile creation step to multiple Slurm jobs by sensibly splitting across a given zoom level etc. It will be useful especially where tiles at higher zoom levels take longer time. Of course, it will be user's responsibility to properly define a valid z, x and y range but an invalid value can easily be ignored and using https://tools.geofabrik.de/calc/#type=geofabrik_standard&bbox=-2.921411,49.255217,6.911598,56.658669&grid=1 tool a person should be able to know which range to request.

Hope the requirement is clear and would be well received.

Thanks a lot for this nice piece of tool!