Read a GeoLibre project
Examples
project <- load_project('{"version":"0.2.0","name":"Example","mapView":{}}')
stopifnot(project$name == "Example")
# A saved project can be reopened as a widget.
path <- tempfile(fileext = ".geolibre.json")
save_project(geolibre() |> add_marker(-77, 39), path)
map <- geolibre(load_project(path))