feat(fonts): add enable option

modules/fonts/default.nix

@@ -1,12 +1,20 @@
-{ pkgs, ... }:
-
 {
-  imports = [
-    ./iosevka.nix
-  ];
+  lib,
+  config,
+  pkgs,
+  ...
+}:
 
+let
+  cfg = config.my.fonts;
+in
+{
+  imports = [ ./iosevka.nix ];
+
+  options.my.fonts.enable = lib.mkEnableOption "fonts";
+
+  config = lib.mkIf cfg.enable {
     fonts = {
-    # disable default font packages (see https://github.com/NixOS/nixpkgs/blob/master/nixos/modules/config/fonts/packages.nix)
       enableDefaultPackages = false;
       packages = with pkgs; [
         dejavu_fonts
@@ -14,4 +22,5 @@
         noto-fonts-color-emoji
       ];
     };
+  };
 }

modules/fonts/iosevka.nix

@@ -1,6 +1,12 @@
-{ pkgs, ... }:
+{
+  lib,
+  config,
+  pkgs,
+  ...
+}:
 
 {
+  config = lib.mkIf config.my.fonts.enable {
     fonts = {
       packages = with pkgs; [
         (iosevka-bin.override { variant = "SGr-IosevkaTermSS08"; })
@@ -11,4 +17,5 @@
         };
       };
     };
+  };
 }