Refactor: Rename system.server -> system.services

Fix #6

modules/system/services/openssh/default.nix

@@ -0,0 +1,22 @@
+{ config, lib, ... }:
+
+with lib;
+let
+  cfg = config.modules.system.services.openssh;
+in
+{
+  options.modules.system.services.openssh = {
+    enable = mkEnableOption ''
+      Enable openssh with my custom configurations
+    '';
+  };
+  config = mkIf cfg.enable {
+    services.openssh = {
+      enable = true;
+
+      settings = {
+        PasswordAuthentication = true;
+      };
+    };
+  };
+}