feature(bootloader): add bootloader module with systemd-boot and plymouth

modules/nixos/bootloader.nix

@@ -0,0 +1,27 @@
+{ config, lib, pkgs, ... }:
+
+{
+  # set bootloader to systemd
+  boot.loader = {
+    systemd-boot.enable = true;
+    efi.canTouchEfiVariables = true;
+  };
+
+  # enable systemd initrd
+  boot.initrd.systemd.enable = true;
+  
+  # plymouth
+  boot.plymouth = {
+    enable = true;
+    theme = "spinner";
+  };
+
+  # kernel options
+  boot.kernelParams = [ "quiet" "loglevel=2" ];
+  boot.kernelPackages = pkgs.linuxPackages_latest;
+
+  # Add boot-related packages
+  environment.systemPackages = with pkgs; [
+    efibootmgr
+  ];
+}