refactor(system): flatten

inputs/system/modules/base/boot/default.nix

@@ -0,0 +1,6 @@
+{
+  imports = [
+    ./loader
+    ./plymouth.nix
+  ];
+}

inputs/system/modules/base/boot/loader/default.nix

@@ -0,0 +1,17 @@
+{ lib, ... }:
+
+let
+  inherit (lib) types mkOption;
+in
+
+{
+  imports = [
+    ./systemd
+    # ./grub
+  ];
+
+  options.systemModules.boot.loader = mkOption {
+    type = types.enum ["systemd" "grub"];
+    default = "systemd";
+  };
+}

inputs/system/modules/base/boot/loader/grub.nix

@@ -0,0 +1 @@
+## to be implemented

inputs/system/modules/base/boot/loader/systemd.nix

@@ -0,0 +1,18 @@
+{ lib, config, ... }:
+
+let
+  inherit (lib) mkIf;
+  bootloader = config.systemModules.boot.loader;
+in
+
+{
+  config = mkIf (bootloader == "systemd") {
+    boot.loader = {
+      systemd-boot = {
+        enable = true;
+        consoleMode = "max";
+      };
+      efi.canTouchEfiVariables = true;
+    };
+  };
+}

inputs/system/modules/base/boot/plymouth.nix

@@ -0,0 +1,18 @@
+{ lib, config, pkgs, ... }:
+
+let
+  inherit (lib) mkIf mkEnableOption;
+  cfg = config.systemModules.plymouth;
+in
+
+{
+  options.systemModules.boot.plymouth.enable = mkEnableOption "";
+
+  config = mkIf cfg.enable {
+    boot.plymouth = {
+      enable = true;
+      themePackages = [(pkgs.catppuccin-plymouth.override {variant = "mocha";})];
+      theme = "catppuccin-mocha";
+    };
+  };
+}