libkookie: kitty: add font size configuration option

infra/libkookie/modules/workstation/ui/kitty/config.nix

@@ -7,7 +7,9 @@ let
       (mapAttrsToList (k: v: "${k} ${v}") cfg.colors));
 in
 ''
-  font_size 12
+  font_size ${builtins.toString cfg.fontSize}
+
+  disable_ligatures always
   
   open_url_modifiers ctrl+shift
   open_url_with default

infra/libkookie/modules/workstation/ui/kitty/default.nix

@@ -48,6 +48,15 @@ with lib;
         Specify the shape of the cursor used for kitty.
       '';
     };
+
+    fontSize = mkOption {
+      type = types.int;
+      default = 12;
+      description = ''
+        Set the font size to use in kitty.  This will generate a 
+        `font_size` expression.
+      '';
+    };
     
     colors = mkOption {
       type = types.attrs;