Feature request: Color override setting for file/directory indicator column

Hello,

Currently the file/directory indicator column (the first character column with --long output) color is set to the color of the file type (which is picked up from LS_COLORS).

$ lsd --color=always
drwxr-xr-x agaia agaia 4.0 KB Fri Oct 29 09:27:51 2021 🗀 some_dir
.rw-r--r-- agaia agaia 1.9 KB Wed Oct 27 14:04:28 2021 🗀 some_file
^-----The colors of this first column 'd' and '.' match 'some_dir' and 'some_file's colors respectively

I would greatly appreciate a setting in the theme yaml to explicitly set the color of the file/directory indicator independent of the file type color.

I suggest an optional setting in the theme yaml. If this field is absent, fall back to the file type color from LS_COLORS.

# excerpt from theme.yaml
directory-indicator: 15

My personal goal is to mimic gnu ls where only the file name is colored while retaining lsd's file icons. I would do so by setting the file/directory indicator to white. I already color the permissions, size, etc to white.

Start by tracing how theme YAML settings are parsed and how the file/directory indicator is colored in --long output. Check the existing LS_COLORS fallback path and identify the relevant color-rendering tests, if present. Done means an optional directory-indicator theme setting overrides that column while absent settings retain the current file-type color.