reportMode method
Implementation
@override
void reportMode(int mode, bool decPrivate) {
final state = switch (decPrivate) {
true => _decModeState(mode),
false => _ansiModeState(mode),
};
final privateMarker = switch (decPrivate) {
true => '?',
false => '',
};
onOutput?.call('\x1b[$privateMarker$mode;$state\x24y');
}