MacOS dark mode profile auto-switching

Thank you for a very useful plugin. ❤️ 

I believe ST4 has dark mode support at theme level. Is that right? 🤔

However, wouldn't it be much more powerful if the entire profile could auto-switch in sync with your MacOS? Or is there a way to do that already, that I wasn't aware of?

I'm no python dev, so it's not easy for me to contrib this feature, but curious what you think.