GeoJSON Feature support

[fgalan]

Is your feature request related to a problem / use case? Please describe.

Orion doesn't support valid GeoJSON as this one (can be checked here:

{
    "type": "Feature",
    "geometry": {
        "type": "Point",
        "coordinates": [
            -3.6127119138731127,
            40.53901978067972
        ]
    },
    "properties": {
        "label": "-3.6127119138731127, 40.53901978067972"
    }
}

given that is a Feature and MongoDB doesn't support that type and a 500 Internal Error response results in that case.

Describe the solution you'd like

The structure of the Feature GeoJSON is fixed, so it would be easy for Orion to move directly the geometry field to the location fiedl in the DB where the geo index is built

Describe alternatives you've considered

User can use ignoreType metadata to support that case, but the geo-location of the entity will be lost (i.e. a query query covering will not work).

Describe why you need this feature

• To approach a new use case.
• To improve or simplify an scenario.

Do you have the intention to implement the solution

• Yes, I have the knowledge to implement this new feature.

[fgalan]

FeaturesCollection type should be also supported:

• If only has one element, takes the geometry of such first element
• If has more than one element, return error

[fgalan]

PR #4116

[fgalan]

Extra PR #4126, changing the retrieval logic, based in internal discussions.

[fgalan]

Extra PR #4129 to support ignoreType in the new geo:json types

[fgalan]

Extra PR #4139 fixing some ignoreType support gaps