add(fonts): modular fonts

apps/ghostty/default.nix

@@ -1,6 +1,7 @@
 {
   config,
   pkgs,
+  myConfig,
   ...
 }: {
   home.packages = [
@@ -54,6 +55,7 @@
     enableFishIntegration = true;
 
     settings = {
+      font-family = myConfig.font.monospace;
       confirm-close-surface = false;
       app-notifications = false;
       window-padding-x = 15;