Add new server modules and configurations for various services

- Introduced `default-creds` module for managing default credentials with Umami integration.
- Added `fail2ban` module for brute-force attack protection with configurable ban times.
- Created `firewall` module to enable and configure basic firewall settings.
- Implemented `gitea` module for self-hosted Git service with PostgreSQL backend.
- Developed `glance` module for a customizable dashboard with various widgets and themes.
- Added `iknowyou` module for a self-hosted password manager with production and demo environments.
- Introduced `kernel-hardening` module for enhancing kernel security settings.
- Created `mazanoke` module for a simple web application with Nginx integration.
- Added `mealie` module for a self-hosted meal planning application.
- Implemented `stirling-pdf` module for PDF generation service.
- Developed `umami` module for self-hosted analytics with secret management.
- Added `ssh` module for secure SSH configuration with user restrictions.
- Introduced `nixy` theme for a customized aesthetic experience across services.

home/programs/nightshift/default.nix

@@ -0,0 +1,19 @@
+{pkgs, ...}: let
+  nightshift-toggle =
+    pkgs.writeShellScriptBin "nightshift-toggle"
+    # bash
+    ''
+      if pidof "hyprsunset"; then
+        pkill hyprsunset
+        ${pkgs.libnotify}/bin/notify-send "Night Shift Disabled" "Returning to full spectrum light. Filter disabled."
+      else
+        ${pkgs.hyprsunset}/bin/hyprsunset -t 4500 &
+        ${pkgs.libnotify}/bin/notify-send "Night Shift Activated" "Welcome to the warm side. Blue light filtering is now active."
+      fi
+    '';
+in {
+  home.packages = with pkgs; [
+    hyprsunset
+    nightshift-toggle
+  ];
+}