Dark mode options

[timlucastech]

In the original Arduino IDE I have a custom theme installed.
It would be nice to see a dark option that has the dark blue-grey tone and nicely contrasted text in a similar style to this one.
See picture as example:

Comparison to current Dark Mode

While its low priority, I find the colors of this theme relaxing on the eyes, moreso than the current dark mode, although it is already a lot nicer than the white alternative.
You can find the original theme for reference here. It is modeled after VSCode theme "One Dark Pro"

https://create.arduino.cc/projecthub/konradhtc/one-dark-arduino-modern-dark-theme-for-arduino-ide-2fca81

[kittaakos]

Good idea; with the next version we want to support any VS Code themes.

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[ubidefeo]

brought this one into #58