Location query - reverse search (lat-lon to location)

Start by reviewing the open pull request #71, which is already linked to this issue. Compare its implementation with the requested WGS84 coordinate input and example GeoJSON response. Done means the API supports reverse location lookup and returns the requested response shape.

We would like to add a support to our API that for a given WGS84 coordinates, it will response with whats in that location.
For example, for a given (-118.30724539059837, 33.71618286284796) coordinates, It will response with geojson like so:

{
    "type": "FeatureCollection",
    "geocoding": {
        "version": "0.1.0",
        "query": {
            "query": "school",
            "disable_fuzziness": false,
            "geo_context": { "bbox": [2.34509596673945, 48.87896264245859, 2.3502230438252525, 48.881502327359925] },
            "geo_context_mode": "filter",
            "limit": 5
        },
        "response": {
            "results_count": 1,
            "max_score": 1.2880917,
            "match_latency_ms": 7,
            "name": "",
            "place_types": [ "education" ],
            "sub_place_types": [ "school" ],
            "hierarchies": []
        }
    },
    "features": [
        {
            "type": "Feature",
            "geometry": {
                "coordinates": [ [ [ -118.30812263653988, 33.71684417247593 ],
                        [ -118.30861990876181, 33.71674433152869 ],
                        [ -118.30879709771484, 33.71635922964194 ],
                        [ -118.30619642115158, 33.71550819588987 ],
                        [ -118.30586490633668, 33.715921827872904 ],
                        [ -118.30587062210924, 33.716183318328746 ],
                        [ -118.30812263653988, 33.71684417247593 ]
                    ]
                ],
                "type": "Polygon"
            },
            "properties": {
                "score": 1.2880917,
                "matches": [ { "layer": "osm_schools", "source": "OSM", "source_id": [ "1a5b981b-bb0e-44dd-b9e2-424b92f2de49" ] } ],
                "names": { "en": [ "White Point Elementary School" ], "fr": [ "Escuela Primaria White Point" ], "default": [ "White Point Elementary School" ], "display": "White Point Elementary School" },
                "placetype": "education",
                "sub_placetype": "school",
                "regions": [ { "region": "USA", "sub_region_names": [ "Los Angeles" ] } ]
            }
        }
    ]
}