tree-wide change. seperated config from 'real' modles.

configs/nixos/i3/lockscreen.nix

@@ -0,0 +1,29 @@
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}: {
+  environment.systemPackages = with pkgs; [
+    betterlockscreen
+  ];
+  home-manager.users.${config.host.user} = {
+    config,
+    osConfig,
+    lib,
+    ...
+  }: {
+    xsession.windowManager.i3.config = {
+      keybindings = let
+        mod = config.xsession.windowManager.i3.config.modifier;
+      in {
+        "${mod}+x" = ''
+          exec --no-startup-id betterlockscreen --lock blur
+        '';
+      };
+    };
+    imports = [
+      ../../home-manager/feh.nix
+    ];
+  };
+}