💡 Feature request: Split automatic theme switching and theme selection into separate options

[3ster]

Is your feature request related to a problem? Please describe.

Enabling automatic theme switching by selecting the "System" theme only supports the default light and dark themes.

Describe the feature you would like to be implemented

The ability to select what theme to switch to depending on system dark-/light-mode.

Describe alternatives you've considered

Sticking to the default dark/light themes, which significantly reduces customizability, or turning off automatic theme switching, which reduces usability.

[DokterKaj]

Adding onto this, it would be nice if themes were listed in a more logical order (e.g. System, Light, Dark, Black, Libreddit Light, ...) rather than alphabetically