feat: add email integration with mu4e and protonmail-bridge

- Configure mu4e in Doom Emacs with Proton mail account
- Add protonmail-bridge service and mbsync/msmtp for mail sync
- Integrate sops-nix for secrets management (mail password)
- Create mail.nix with full IMAP/SMTP configuration
- Add ComfyUI user service module
- Add custom ASCII banner for Doom dashboard
- Enable nix module in Doom Emacs
- Add force-quit gnome extension
- Ignore secrets directory in git
- also add comfy-ui

home-manager/gnome/default.nix

@@ -30,6 +30,7 @@
   home.packages = with pkgs; [
     gnome-tweaks
     gnomeExtensions.appindicator
+    gnomeExtensions.force-quit
     gnomeExtensions.forge
     gnomeExtensions.gsconnect
     gnomeExtensions.pop-shell