Add jackett config and generate colmena hosts from attribute set

hosts/jackett/configuration.nix

@@ -1,10 +1,9 @@
-{ config, pkgs, ... }:
-
+{ ... }:
 {
-  imports = [
-    ./hardware-configuration.nix
-    ./jackett.nix
-  ];
+  boot.loader.grub = {
+    enable = true;
+    device = "/dev/vda";
+  };
 
   networking = {
     hostName = "jackett";

hosts/jackett/default.nix

@@ -0,0 +1,7 @@
+{ ... }:
+{
+  imports = [
+    ./configuration.nix
+    ./jackett.nix
+  ];
+}

hosts/nitter/configuration.nix

@@ -1,4 +1,4 @@
-{ config, pkgs, ... }:
+{ ... }:
 {
   boot.loader.grub = {
     enable = true;