feat: add plymouth

modules/system/apps/default.nix

@@ -9,6 +9,7 @@ _: {
     ./letsencrypt
     ./nginx
     ./openconnect
+    ./plymouth
     ./postgresql
     ./redis
     ./rustdesk

modules/system/apps/plymouth/default.nix

@@ -0,0 +1,22 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+let
+  cfg = config.mySystemApps.plymouth;
+in
+{
+  options.mySystemApps.plymouth = {
+    enable = lib.mkEnableOption "plymouth";
+  };
+
+  config = lib.mkIf cfg.enable {
+    boot.plymouth = {
+      enable = true;
+      themePackages = [ (pkgs.catppuccin-plymouth.override { variant = "mocha"; }) ];
+      theme = "catppuccin-mocha";
+    };
+  };
+}