Auto detect dark or light color from terminal by using term-codes

### Checklist

- [X] I have read through the manual page (`man fzf`)
- [X] I have searched through the existing issues
- [ ] For bug reports, I have checked if the bug is reproducible in the latest version of fzf

### Output of `fzf --version`

0.57.0

### OS

- [ ] Linux
- [ ] macOS
- [ ] Windows
- [ ] Etc.

### Shell

- [ ] bash
- [ ] zsh
- [ ] fish

### Problem / Steps to reproduce

Some terminals suport:
https://github.com/contour-terminal/contour/blob/master/docs/vt-extensions/color-palette-update-notifications.md#dark-and-light-mode-detection

fzf should leverage it, to automatically apply `--color=light` or `--color=dark` at startup if colors are not set by the user.