emacs-doom-modeline: Some icons are missing

## Steps to reproduce

1. guix install emacs-doom-modeline

2. Start Emacs

3. M-x doom-modeline-mode

## Expected result

Doom modeline and its icons display correctly.

## Unexpected result

Doom modeline is displayed, but some of its icons are missing. You only see Unicode placeholders.

To be able to see the appropriate icons, one have to perform additional steps:

1. guix install emacs-all-the-icons

2. Start Emacs

3. M-x all-the-icons-install-fonts

I would expect "guix install emacs-doom-modeline" to install emacs-all-the-icons, and the latter to install any required font packages.

## System information

GNU Emacs 27.1

emacs-doom-modeline 3.0.0

GNU Guix efa773f

---

Luis Felipe López Acevedo

Hi Guix,

This issue still persists on:

guix d884fc9

GNU Emacs 30.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.37,

cairo version 1.16.0)

doom-modeline 20230624.1524

In addition to that, all-the-icons-install-fonts doesn't seem to fix

the missing icons in doom-modeline, even though the installation doesn't

run into erroneous behaviour during install and all-the-icons.ttf is

present afterwards:

(~) λ fc-list | grep all-the

/home/wilko/.guix-profile/share/fonts/all-the-icons.ttf: all\-the\-icons:style=Regular

/run/current-system/profile/share/fonts/all-the-icons.ttf: all\-the\-icons:style=Regular

/home/wilko/.local/share/fonts/all-the-icons.ttf: all\-the\-icons:style=Regular

I assume that the latter issue may be more on the emacs-all-the-icons

side of things, and not particular emacs-doom-modeline related.

--

Kind regards,

Wilko Meyer

w@wmeyer.eu