✨ Add Minegrub theme

flake.nix

···
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
     easy-hosts.url = "github:tgirlcloud/easy-hosts";
     sops-nix.url = "github:Mic92/sops-nix";
+    minegrub-theme.url = "github:Lxtharia/minegrub-theme";
 
     flake-parts = {
       url = "github:hercules-ci/flake-parts";

modules/flake/default.nix

···
     # Automagically imports libs from "/lib/lib-name" and exposes them to the `flake.lib` output.
     ./lib.nix
 
-    # Exposes nixosModules and homeModules on flake outputs.
-    ./modules.nix
-
     # Automagically imports systems from "/systems/arch-classname/system-name".
     ./systems.nix
   ];

modules/flake/systems.nix

···
         (lib.optionals (class == "nixos") [
           inputs.home-manager.nixosModules.default
           inputs.sops-nix.nixosModules.sops
+          inputs.minegrub-theme.nixosModules.default
         ])
         ++ (self.lib.dirToModuleList ../${class}); # Import modules based on current classname.
     };

systems/x86_64-nixos/puzzlevision/default.nix

···
     blacklistedKernelModules = [
       "rtw88_8821ce" # Block the default network-card driver.
     ];
+
+    # Grub configuration
+    loader.grub = {
+      # Minecraft bootloader theme
+      minegrub-theme = {
+        enable = true;
+        splash = "100% Flakes!";
+        background = "background_options/1.18 - [Caves And Cliffs 2].png";
+        boot-options-count = 4;
+      };
+    };
   };
 
   networking.hostName = "puzzlevision";