refactor: make the whole thing more generic

modules/nixos/fonts/noto-sans.nix

@@ -0,0 +1,30 @@
+{ pkgs, lib, config, ... }:
+with lib;
+
+let cfg = config.fonts.noto-sans;
+
+in {
+  options.fonts.noto-sans = {
+    enable = mkEnableOption "Enable the Noto Sans font";
+    default = mkOption {
+      type = types.bool;
+      description = "Make Noto Sans the default sans-serif font";
+      default = false;
+    };
+  };
+
+  config = mkIf cfg.enable {
+    fonts = {
+      packages = with pkgs; [ noto-fonts noto-fonts-cjk noto-fonts-emoji ];
+      nerdfonts.additionalFonts = [ "Noto" ];
+      fontconfig = {
+        defaultFonts.sansSerif = mkIf cfg.default [
+          (if (config.fonts.nerdfonts.enable) then
+            "Noto Sans Nerd Font"
+          else
+            "Noto Sans")
+        ];
+      };
+    };
+  };
+}