tidy: set space in project

Usage

set_space(proj, type = "real", seed = NULL, ...)

proj: fastan::project object.
type: string, default = "real", if "random" a random set of coordinates is generated, if "real" a data.frame with coordinates is expected.
seed: numeric, seed in case of simdata (only makes sense if type = "random"), if NULL (default) no seed is set.
...: dot args.