restructured core modules

modules/system/core/boot.nix

@@ -0,0 +1,36 @@
+{
+  self,
+  inputs,
+  ...
+}: {
+  flake.nixosModules.bootloader = {
+    pkgs,
+    lib,
+    ...
+  }: {
+    boot = {
+      loader = {
+        timeout = 2;
+        efi = {
+          canTouchEfiVariables = true;
+        };
+        grub = {
+          efiSupport = true;
+          device = "nodev";
+          theme = pkgs.catppuccin-grub;
+        };
+      };
+      plymouth = {
+        enable = true;
+        theme = "catppuccin-mocha";
+        themePackages = with pkgs; [
+          # By default we would install all themes
+          (catppuccin-plymouth.override {
+            variant = "mocha";
+          })
+        ];
+      };
+      kernelPackages = pkgs.linuxPackages_latest;
+    };
+  };
+}