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/shell/fzf.nix

@@ -0,0 +1,33 @@
+# Fzf is a general-purpose command-line fuzzy finder.
+{
+  config,
+  lib,
+  ...
+}: let
+  accent = "#" + config.lib.stylix.colors.base0D;
+  foreground = "#" + config.lib.stylix.colors.base05;
+  muted = "#" + config.lib.stylix.colors.base03;
+in {
+  programs.fzf = {
+    enable = true;
+    enableZshIntegration = true;
+    colors = lib.mkForce {
+      "fg+" = accent;
+      "bg+" = "-1";
+      "fg" = foreground;
+      "bg" = "-1";
+      "prompt" = muted;
+      "pointer" = accent;
+    };
+    defaultOptions = [
+      "--margin=1"
+      "--layout=reverse"
+      "--border=none"
+      "--info='hidden'"
+      "--header=''"
+      "--prompt='/ '"
+      "-i"
+      "--no-bold"
+    ];
+  };
+}