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.

flake.nix

@@ -0,0 +1,77 @@
+{
+  # https://github.com/anotherhadi/nixy
+  description = ''
+    Nixy simplifies and unifies the Hyprland ecosystem with a modular, easily customizable setup.
+    It provides a structured way to manage your system configuration and dotfiles with minimal effort.
+  '';
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+    nixpkgs-stable.url = "github:nixos/nixpkgs/nixos-25.11";
+    nixos-hardware.url = "github:NixOS/nixos-hardware/master";
+    hyprland.url = "git+https://github.com/hyprwm/Hyprland?submodules=1";
+    stylix.url = "github:danth/stylix";
+    sops-nix.url = "github:Mic92/sops-nix";
+    nvf.url = "github:notashelf/nvf";
+    notashelf-tuigreet.url = "github:NotAShelf/tuigreet";
+    helium-browser.url = "github:oxcl/nix-flake-helium-browser";
+    nur-anotherhadi.url = "github:anotherhadi/nur-packages";
+
+    nix-index-database = {
+      url = "github:nix-community/nix-index-database";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    home-manager = {
+      url = "github:nix-community/home-manager";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    caelestia-shell = {
+      url = "github:caelestia-dots/shell";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    caelestia-cli = {
+      url = "github:caelestia-dots/cli";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+
+    # Server
+    nixarr.url = "github:rasmus-kirk/nixarr";
+    default-creds.url = "github:anotherhadi/default-creds";
+    blog.url = "github:anotherhadi/blog";
+    awesome-wallpapers.url = "github:anotherhadi/awesome-wallpapers";
+    iknowyou.url = "github:anotherhadi/iknowyou";
+  };
+
+  outputs = inputs @ {
+    nixpkgs,
+    nixpkgs-stable,
+    ...
+  }: let
+    system = "x86_64-linux";
+    pkgs = nixpkgs.legacyPackages.${system};
+    args = {
+      inherit
+        inputs
+        nixpkgs
+        system
+        pkgs
+        ;
+      pkgs-stable = nixpkgs-stable.legacyPackages.${system};
+      pkgs-nur-hadi = inputs.nur-anotherhadi.packages.${system};
+    };
+    merge = nixpkgs.lib.foldl nixpkgs.lib.recursiveUpdate {};
+  in
+    merge [
+      (import ./home/programs/nvf/flake.nix args)
+      (import ./home/programs/group/flake.nix args)
+      (import ./home/programs/nixy/flake.nix args)
+      {
+        formatter.${system} = pkgs.alejandra;
+        nixosConfigurations = {
+          h-laptop = import ./hosts/laptop/flake.nix args;
+          h-work = import ./hosts/work/flake.nix args;
+          jack = import ./hosts/server/flake.nix args;
+        };
+      }
+    ];
+}