[Bug] Incorrect and Misleading README

[ngtv2409]

This issue is related to the discussion: eza #1678

I noticed the README file in this repository has a misleading instruction, specifically the section File- and Extension-Based Overrides.

The README suggests styling icons like this:

You can customize the appearance and icons for specific filenames or file extensions,
allowing for granular control over how certain files are displayed.
Filenames

To override styles for specific filenames:

filenames:
  "Makefile":
    filename:
      foreground: Red
      is_bold: true
    icon:
      glyph: ⚙️
      foreground: Red

Which is NOT correct. Because the structs relating to this theme field are defined:

#[derive(Debug, Default, PartialEq, Eq, Clone, Copy, Serialize, Deserialize)]
pub struct IconStyle {
    pub glyph: Option<char>,
    pub style: Option<Style>,
}

#[derive(Debug, Default, PartialEq, Eq, Clone, Copy, Serialize, Deserialize)]
pub struct FileNameStyle {
    pub icon: Option<IconStyle>,
    pub filename: Option<Style>,
}

And we can see that the styling of icons should be under style. So the correct way to do that is:

extensions:
  c:
    filename:
      foreground: Green
    icon:
      glyph: C
      style:
        foreground: Red

Not foreground directly under icon:. Infact: All of the instructions in the section are incorrect.