Center icons with characters

[mdSlash]

Describe the bug
The icons aren't centered with the characters.

Expected behavior
Icons should be center-aligned with the characters.

Additional context
If an icon takes up more than one cell, some terminals may truncate or shrink it to fit. Others might display it as-is.

For example, Kitty terminal may render icons that span multiple cells as small or truncated. In this case, the issue isn't with IconicFonts but with the terminal itself. You might need to use a different terminal or contact the developer.

On the other hand, terminals that handle glyphs differently, such as Alacritty, align the icons perfectly with characters.

To address this, one solution could be to create two font variants: one with an icon centered within a single cell and another with an icon centered across two cells, to fit different terminal rendering styles

Screenshots

one cell:

two cells: