Styling configuration support

[CompeyDev]

Currently, there is a barebones system for styling in configs, however, we do not make use of the provided config anywhere. It is also somewhat limited, and I would like to have truecolor support as well, since a lot of terminals support it now.

There are a few challenges for this, though:

• We use crossterm as the ratatui backend with our own SSH stream implementation; see RGB / 24 bit true color glitching / blinking in macOS terminal.app ratatui/ratatui#475
• It is possible some crates might try to query the terminal emulator for truecolor capabilities, which won't work over SSH
• How should the default color palette look? Should we allow multiple palettes with a interactive selection menu at runtime?

[CompeyDev]

FWIW, this seems a bit problematic at the moment, it might be best to just ditch configuration altogether, in light of #7.