* add contrast to conf/class against bbox rectangle color
* added feature to save conf in txt labels
* Update general.py
* Update detect.py
* Update detect.py
* Update detect.py
save_conf variable removed as only used once, so we can use opt.save_conf instead.
* Update detect.py
* Update detect.py
Co-authored-by: Glenn Jocher <glenn.jocher@ultralytics.com>
