refactor: move home-manager module to flake to prevent infinite recursion errors when importing modules

flake.nix

@@ -22,7 +22,12 @@
   };
 
   outputs =
-    { nixpkgs, ... }@inputs:
+    {
+      nixpkgs,
+      home-manager,
+      agenix,
+      ...
+    }@inputs:
     let
       commonSystem =
         {
@@ -31,7 +36,23 @@
           system ? "x86_64-linux",
         }:
         nixpkgs.lib.nixosSystem {
-          modules = [ ./hosts/${hostName}/configuration.nix ];
+          modules = [
+            ./hosts/${hostName}/configuration.nix
+            home-manager.nixosModules.home-manager
+            {
+              home-manager = {
+                users.${userName}.imports = [
+                  ./hosts/${hostName}/home.nix
+                ];
+                backupFileExtension = "backup";
+                extraSpecialArgs = {
+                  inherit userName;
+                };
+                useGlobalPkgs = true;
+                useUserPackages = true;
+              };
+            }
+          ];
           specialArgs = {
             inherit inputs;
             inherit hostName;