feat: Add templates for external configs

templates/user/home.nix

@@ -0,0 +1,91 @@
+{ inputs, ... }:
+
+# ============================================================================
+# User Home Manager Configuration Template
+# ============================================================================
+# This file provides home-manager configuration for a user.
+# It will be imported into the NixOS system's home-manager configuration.
+#
+# Usage in users.nix:
+#   myusername = {
+#     description = "My Name";
+#     home = builtins.fetchGit {
+#       url = "https://github.com/username/dotfiles";
+#       rev = "commit-hash";
+#     };
+#   };
+#
+# This module receives the same `inputs` flake inputs as the main
+# nixos-systems configuration (nixpkgs, home-manager, etc.).
+
+{
+  config,
+  lib,
+  pkgs,
+  osConfig,  # Access to the OS-level config
+  ...
+}:
+
+{
+  # ========== Home Manager Configuration ==========
+  
+  # User identity (required)
+  home.username = lib.mkDefault config.home.username;  # Set by system
+  home.homeDirectory = lib.mkDefault config.home.homeDirectory;  # Set by system
+  home.stateVersion = lib.mkDefault "25.11";
+
+  # ========== Packages ==========
+  home.packages = with pkgs; [
+    # Add your preferred packages here
+    # htop
+    # ripgrep
+    # fd
+    # bat
+  ];
+
+  # ========== Programs ==========
+  
+  # Git configuration
+  programs.git = {
+    enable = true;
+    userName = "Your Name";
+    userEmail = "your.email@example.com";
+    extraConfig = {
+      init.defaultBranch = "main";
+    };
+  };
+
+  # Zsh configuration
+  programs.zsh = {
+    enable = true;
+    # System theme is applied automatically if useZshTheme = true in users.nix
+    # Add your custom zsh config here
+  };
+
+  # Neovim configuration
+  # programs.neovim = {
+  #   enable = true;
+  #   # System nvim config is applied automatically if useNvimPlugins = true
+  #   # Add your custom neovim config here
+  # };
+
+  # ========== Shell Environment ==========
+  
+  home.sessionVariables = {
+    EDITOR = "vim";
+    # Add your custom environment variables
+  };
+
+  # ========== Dotfiles ==========
+  
+  # You can manage dotfiles with home.file
+  # home.file.".bashrc".source = ./dotfiles/bashrc;
+  # home.file.".vimrc".source = ./dotfiles/vimrc;
+
+  # Or use programs.* options for better integration
+  
+  # ========== XDG Configuration ==========
+  
+  xdg.enable = true;
+  # xdg.configFile."app/config.conf".source = ./config/app.conf;
+}