Support for offline maps in .osm.pbf format

[mbx64]

Autopsy does currently only support raster tiles as offline maps (either .zip or .mbtiles, see docs). Raster tiles have some major disadvantages:

• High storage consumption
• Almost unavailable on the internet, except behind pay walls
• Not easy to generate/render from vector tiles by oneself

It seems to be way more common to share offline map data via vector tiles, e. g.:

• https://download.geofabrik.de/
• https://wiki.openstreetmap.org/wiki/Planet.osm

It would be nice to have support for publicly available map data in .osm.pbf format.