Move all of NixOS to nixos/ in preparation of the repository merge

nixos/modules/tasks/lvm.nix

@@ -0,0 +1,15 @@
+{ config, pkgs, ... }:
+
+{
+
+  ###### implementation
+
+  config = {
+
+    environment.systemPackages = [ pkgs.lvm2 ];
+
+    services.udev.packages = [ pkgs.lvm2 ];
+
+  };
+
+}