Update documentation for new structure

- Update README with new modules/shared structure
- Update examples/flake-structure.nix to use lib/

examples/flake-structure.nix

@@ -1,49 +1,43 @@
 {
-  inputs = {};
-  outputs = inputs@{}: let
-    darwinHostConfig = { system, hostname, username, additionalModules, additionalSpecialArgs }:
-      nix-darwin.lib.darwinSystem { };
-
-    mkNixosHost = { system, hostname, username, additionalModules, additionalSpecialArgs }:
-      nixpkgs.lib.nixosSystem { };
-    
-    linuxHomeConfig = { system, hostname, username, additionalModules, additionalSpecialArgs }:
-      home-manager.lib.homeManagerConfiguration { };
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-25.05";
+    home-manager.url = "github:nix-community/home-manager";
+    nix-darwin.url = "github:lnl7/nix-darwin";
+    nixos-hardware.url = "github:NixOS/nixos-hardware";
+  };
 
+  outputs = inputs@{ self, ... }: let
+    # Import helper functions from lib/
+    localLib = import ./lib { inherit inputs; };
   in {
     # Darwin (macOS) hosts
     darwinConfigurations = {
-      mightymac = darwinHostConfig {
+      mightymac = localLib.mkDarwinHost {
         system = "aarch64-darwin";
         hostname = "mightymac";
         username = "gene.liverman";
-        additionalModules = [];
-        additionalSpecialArgs = {};
       };
     };
 
     # NixOS hosts
     nixosConfigurations = {
-      rainbow-planet = mkNixosHost {
+      rainbow-planet = localLib.mkNixosHost {
         system = "x86_64-linux";
         hostname = "rainbow-planet";
         username = "gene";
         additionalModules = [
-          nixos-hardware.nixosModules.dell-xps-13-9360
+          inputs.nixos-hardware.nixosModules.dell-xps-13-9360
         ];
-        additionalSpecialArgs = {};
       };
     };
 
     # Home Manager (only) users
     homeConfigurations = {
-      gene = linuxHomeConfig {
+      gene = localLib.mkHomeConfig {
         system = "x86_64-linux";
-        hostname = "mini-watcher";
+        homeDirectory = "/home/gene";
         username = "gene";
-        additionalModules = [];
-        additionalSpecialArgs = {};
       };
     };
   };
-}
+}