Add fontconfig package to set 0xProto Nerd Font as default monospace

Without this, apps that fall back to fontconfig's generic 'monospace'
alias (rather than requesting the Nerd Font by name) don't pick up
the glyphs kitty/foot/waybar etc. rely on.

packages/fontconfig/.config/fontconfig/fonts.conf

@@ -0,0 +1,10 @@
+<?xml version="1.0"?>
+<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
+<fontconfig>
+  <alias>
+    <family>monospace</family>
+    <prefer>
+      <family>0xProto Nerd Font</family>
+    </prefer>
+  </alias>
+</fontconfig>

src/packages.ts

@@ -14,6 +14,7 @@ export const packages: Pkg[] = [
   { name: "pciutils", tier: "required" },
   { name: "stow", tier: "required" },
   { name: "ttf-0xproto-nerd", tier: "required" },
+  { name: "fontconfig", tier: "required" },
   { name: "waybar", tier: "recommended", group: "bar" },
   { name: "hyprlauncher", tier: "recommended", group: "launcher" },
   { name: "kitty", tier: "recommended" },