[BUG] PyQtDarkTheme is broken

[benjaminwp18]

Describe the bug

PyQtDarkTheme is broken in Python 3.12. To make our GUI work in 3.12, it was removed. Now the GUI follows your system default theme on Ubuntu (i.e. if you pick dark theme in system settings, the GUI will be in dark mode).

Possible Solutions

1. Make our own fork of PyQtDarkTheme (the owner of the original repo is MIA)
2. Find another pre-made dark/light theme
3. Write our own themes from scratch

[benjaminwp18]

Remember to add whatever Python deps are necessary to pyproject.toml and the GUI README

i.e.

pip install pyqtdarktheme