Struct representing a BNGB dictionary entry with translations.
@type t() :: %ExIbge.Bngb.DictionaryEntry{ label_en: String.t() | nil, label_es: String.t() | nil, label_pt: String.t() | nil, term: String.t() | nil }
@spec from_entry({String.t(), map()} | nil) :: t() | nil