feat: add host device type metadata

modules/features/services/openssh.nix

@@ -3,13 +3,12 @@
   flake.modules.nixos.openssh =
     {
       config,
+      hostType ? "desktop",
       lib,
-      host ? {
-        isServer = false;
-      },
       ...
     }:
     let
+      isServer = hostType == "server";
       hostUserNames = builtins.attrNames (
         lib.filterAttrs (_: user: user.isNormalUser or false) config.users.users
       );
@@ -17,7 +16,7 @@
     {
       services.openssh = {
         enable = true;
-        openFirewall = host.isServer;
+        openFirewall = isServer;
         settings = {
           PermitRootLogin = "no";
           PasswordAuthentication = false;