cli

Runs block and turns Argot's outcomes into the usual command-line behaviour:

• success returns the parsed value;

• --help and --version print to stdout and exit 0;

• invalid input prints the usage line and error: … to stderr and exits 2.

fun main(argv: Array<String>) {
    val args = cli { parseServeArgs(argv) }   // generated parser, or ServerArgs().parse(argv)
    runServer(args)
}