Support MLT (MapLibre Tiles)

[maxammann]

There is a new specification for MapLibre tiles: https://github.com/maplibre/maplibre-tile-spec

I don't have details yet on what it would need to write a Rust decoder but @nyurik and @mactrem might know more.

[nyurik]

First task would be a speedypfor implementation. Basically a deserializer for a sequence of integers. There is a c implementation, so the first pass could be a simple wrapper for that

[maxammann]

Can't find it, not this one? https://github.com/lemire/FastPFor

[nyurik]

Yep that's the one -- see https://github.com/maplibre/maplibre-tile-spec/blob/e5ed469f079910ac307f973f809e5761d1924dde/spec/ENCODINGS.md#simd-fastpfor