Automatically create globe anchor for georeferenced tileset

[lilleyse]

If a tileset is tiled in its local coordinates but has a geolocation, we should probably automate its placement with a globe anchor when user adds the asset via the Asset UI.

To do this we would need to:

• Detect that a tileset is georeferenced and movable (we already have tileset metadata fields for these)
• Remove the root tile transform
• Compute the longitude, latitude, height, heading, pitch, roll from the root transform
• Attach a globe anchor