Publish as vector tiles format alongside Geo/TopoJSON about ems-file-service HOT 1 OPEN

While we could publish our regions data as a set of standalone tile layers, I think this is a bit of a dead-end approach - huge number of independently maintained layers, and higher traffic due to each layer being loaded separately. Instead, I would propose to merge our vector data into our existing tile vectors generation pipeline that we are building. This way, those detailed shapes would end up as our main tile generation pipeline, and showing them would be as simple as saying "if vector tile has an element of type X, show it with color Y". In a way, this is no different from our current pipeline on the client:

• take tile, add another layer to the tile from geojson, add tile styling to show that specific element with the new color

With the new approach, the geojson will essentially be already baked into the data tile loaded from the server.

In case of the user-data, the client would still have to do the data tile mixing (loading data from elasticsearch + base layers)

from ems-file-service.