Support protobufs (pbf)

[allthesignals]

IQueryFeaturesOptions allows for pbf file format but query-all-features only supports JSON. We should support this for easier data transfer.

[gavinr]

Thanks for logging the issue. As far as I'm aware, to merge PBF files it is not as simple as joining the binary files together; I think the file contents would need to be parsed and then joined, which is outside the scope of ArcGIS REST JS:

NOTE: for "pbf" you must also supply rawResponse: trueand parse the response yourself using response.arrayBuffer()

(from the link you provided)

If parsing is required, I think that's outside the scope of this repository. I do think there's probably a need for someone to create a library that helps with this though, probably using arcgis-pbf and/or arcgis-pbf-parser.