nixos: use bulk module import

modules/default.nix

@@ -1,14 +1,14 @@
 { lib, ... }:
 
+let
+  dirEntries = builtins.removeAttrs (builtins.readDir ./.) [ "default.nix" ];
+  moduleEntries = lib.attrsets.filterAttrs (n: v: v == "regular") dirEntries;
+  moduleNames = builtins.attrNames moduleEntries;
+
+  modulePaths = builtins.map (name: ./${name}) moduleNames;
+in
 {
-  imports = [
-    ./dwm.nix
-    ./i18n.nix
-    ./audio.nix
-    ./env.nix
-    ./syncthing.nix
-    ./plymouth.nix
-  ];
+  imports = modulePaths;
 
   snowhawk.i18n.enable = lib.mkDefault true;
   snowhawk.audio.enable = lib.mkDefault true;