Runtime information for a systemd unit returned by ListUnits.
ListUnits
@type t() :: %Systemd.Unit{ active_state: String.t(), description: String.t(), followed: String.t(), job_id: non_neg_integer(), job_path: String.t(), job_type: String.t(), load_state: String.t(), name: String.t(), object_path: String.t(), sub_state: String.t() }