replace kernel with cachyos-server for server config

hosts/server/configuration.nix

@@ -12,7 +12,11 @@
 {
   imports = [
     ./hardware-configuration.nix
-    ../../modules/core
+    ../../modules/core/boot_server.nix
+    ../../modules/core/localization.nix
+    ../../modules/core/networking.nix
+    ../../modules/core/system.nix
+    ../../modules/core/users.nix
     ../../modules/hardware/audio.nix
     ../../modules/hardware/storage.nix
     ../../modules/hardware/power.nix

modules/core/boot_server.nix

@@ -0,0 +1,45 @@
+# modules/core/boot.nix
+# Bootloader, kernel, and boot-time configuration
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}:
+
+{
+  boot.loader.systemd-boot.enable = false;
+  boot.loader.limine = {
+    enable = true;
+    style.wallpapers = [ ../../wallpaper/nix.png ];
+    maxGenerations = 5;
+  };
+  boot.loader.limine.secureBoot.enable = true;
+  boot.loader.efi.canTouchEfiVariables = true;
+
+  boot.kernelPackages = pkgs.cachyosKernels.linuxPackages-cachyos-server;
+
+  boot.kernelParams = [
+    "amd_pstate=active"
+    "amdgpu.ppfeaturemask=0xffffffff"
+    "quiet"
+    "splash"
+    "loglevel=3"
+    "rd.udev.log_level=3"
+    "systemd.show_status=auto"
+    "vt.global_cursor_default=0"
+  ];
+
+  boot.consoleLogLevel = 3;
+  boot.resumeDevice = "/dev/mapper/cryptswap";
+
+  boot.initrd.systemd.enable = true;
+  boot.plymouth = {
+    enable = true;
+    theme = "nixos-bgrt";
+    themePackages = [ pkgs.nixos-bgrt-plymouth ];
+  };
+
+  services.scx.enable = true;
+  services.scx.scheduler = "scx_lavd";
+}