initial config commit

modules/nixos/features/agenix.nix

@@ -0,0 +1,21 @@
+{
+  config,
+  inputs,
+  lib,
+  system,
+  userName,
+  ...
+}:
+let
+  feature = "agenix";
+in
+{
+  config = lib.mkIf config.${feature}.enable {
+    age.identityPaths = [ "/home/${userName}/.ssh/id_ed25519" ];
+    environment.systemPackages = [ inputs.agenix.packages.${system}.default ];
+  };
+
+  imports = [ inputs.agenix.nixosModules.default ];
+
+  options.${feature}.enable = lib.mkEnableOption "enables ${feature}";
+}