Move the map and its attributes from the `Farm` domain to the `Area` domain.

[bepitulaz]

The first time users use Tania, they must choose their farm location by clicking on the map. We realize that this feature is useless for the farm level.

It's better to move the map to the area level so that users can draw a geoJSON polygon to the map for each area. If users have the geoJSON data of each area, they can integrate it with other 3rd party services such as plant health analysis service or maybe to fly an autonomous drone.

Any thought about this? Let's discuss.

[jjwedemyer]

To add to the feature, it would be even better to have numerical inputs for the polygon to be as precise as possible. In my expirience planning is done by knowing what the size of the area is (along the edges) and then possibly creating sub-areas that have certain sizes (ie beds of length x and a width y) Edit: Also having areas georeferenced (and maybe displayed on map) would be great