smartd: split into its own module and enable email notifications

lily/config.nix

···
     ../modules/network-info.nix
     ../modules/nix.nix
     ../modules/remote-builder.nix
+    ../modules/smartd.nix
 
     ../modules/services/caddy
     ../modules/services/caddy/atproto-did.nix

lutea/config.nix

···
     ../modules/nix.nix
     ../modules/printing.nix
     ../modules/remote-builder.nix
+    ../modules/smartd.nix
     ../modules/tools.nix
   ];
 

modules/basic.nix

···
   };
 
   security.polkit.enable = true;
-
-  services = {
-    acpid.enable = true;
-    # TODO: Setup email
-    smartd.enable = true;
-  };
+  services.acpid.enable = true;
 
   systemd.network.enable = true;
   networking = {

modules/smartd.nix

···
+{ config, ... }:
+{
+  imports = [ ./msmtp.nix ];
+
+  services.smartd = {
+    enable = true;
+    extraOptions = [ "-i 7200" ];
+    # defaults.monitored = "-a -M test"; # Used for testing sendmail
+    notifications = {
+      wall.enable = false;
+      x11.enable = false;
+      mail = {
+        enable = true;
+        sender = "host-${config.networking.hostName}@y6d.boo";
+        recipient = "[e-mail]";
+      };
+    };
+  };
+}