Typed Inttegro domain value.
@type t() :: %Inttegro.FileParty{ email: String.t() | nil, id: String.t() | nil, name: String.t() | nil, type: String.t() | nil }
@spec from_map(map()) :: t()
@spec new!(map() | keyword()) :: t()
@spec to_map(t()) :: map()