Handle PREFIX/SUFFIX/OUTPUTPREFIX/OUTPUTSUFFIX in telnet host

[github-actions]

moor/crates/kernel/src/tasks/command_parse.rs

Line 165 in 47435a1

// TODO: Handle built-in commands like .program, .flush, etc.

    ]
    .contains(&verb.as_str())
    {
        // TODO: Handle built-in commands like .program, .flush, etc.
        return Err(ParseCommandError::UnimplementedBuiltInCommand);
    }
    // Split into verb and argument string

[rdaum]

#323

[rdaum]

.program has been added to the telnet host.

.flush makes no sense in our world.

PREFIX/SUFFIX not implemented yet, so I'll change this ticket to be just that.