Add an Altitude component on all Geo* archetypes

[abey79]

Adding an Altitude component to all the Geo* archetypes would make them compatible with a future 3D map view and allow the 2D view to display altitude information in some way. (Useful for drone/aero applications.)

⚠️ there are many "altitudes" (ams, elipsoid, height, etc.), so we need a design around this question