import { commands } from "https://deno.land/x/sane_fmt@0.15.1/x/args.ts";
const { SubCommand } = commands;
Declare add subcommand to existing command parser
type
<Main extends CommandReturn<any, any, any>, Name extends string, Sub extends CommandReturn<any, any, any>, ErrList extends readonly ParseError[]>() => Command<SubCommandReturn<Main, Name, Sub>, ErrList>