Add apps and host-users modules

.config/nix/modules/host-users.nix

@@ -0,0 +1,17 @@
+{ ... }@args:
+let
+  hostname = "TobAir";
+  username = "tobi";
+in
+{
+  networking.hostName = hostname;
+  networking.computerName = hostname;
+  system.defaults.smb.NetBIOSName = hostname;
+
+  users.users."${username}" = {
+    home = "/Users/${username}";
+    description = "Tobias Ostner";
+  };
+
+  nix.settings.trusted-users = [ username ];
+}