[feature] Set jadx-gui default themes according to system light/dark mode

[skylot]

Describe your idea

Most systems now provide option to use dark mode and default light theme in jadx-gui fit badly.
Using https://github.com/Dansoftowner/jSystemThemeDetector library, it should be easy to detect current theme mode and apply matching themes by default.

Created by discussion in #2278 (comment)
Related to #1763.