First test of all machines

modules/boot/loader/grub.nix

@@ -0,0 +1,23 @@
+{
+  inputs,
+  outputs,
+  lib,
+  config,
+  pkgs,
+  ...
+}: let
+  inherit (lib) mkEnableOption mkIf mkOption types;
+  cfg = config.horseman.boot.loader.grub;
+in {
+  options = {
+    horseman.boot.loader.grub = {
+      enable = mkEnableOption "Sets grub as the bootloader";
+    };
+  };
+
+  config = {
+    boot.loader.grub.enable = true;
+    boot.loader.grub.device = "/dev/sda";
+    boot.loader.grub.configurationLimit = 10;
+  };
+}