[Linux] Zed does not allow "system-ui"/"sans-serif"/"serif"/"monospace" for font family settings.

[latin-1]

Check for existing issues

• Completed

Describe the bug / provide steps to reproduce it

Fontconfig has some special font families, "system-ui"/"sans-serif"/"serif"/"monospace".
They should be accepted in font family settings. This requires complete fontconfig support.

An example fonts.conf:

  <alias binding="strong">
    <family>monospace</family>
    <prefer>
      <family>Iosevka</family>
    </prefer>
  </alias>
</fontconfig>

With that, "buffer_font-family": "monospace" should function as "buffer_font_family": "Iosevka".

Probably related to #18982, #17203

Zed Version and System Specs

Zed: v0.168.1 (Zed Preview)
OS: Linux Wayland fedora 41
Memory: 27.1 GiB
Architecture: x86_64
GPU: AMD Radeon 780M (RADV GFX1103_R1) || radv || Mesa 24.2.8

If applicable, add screenshots or screencasts of the incorrect state / behavior

No response

If applicable, attach your Zed.log file to this issue.

No response