restructured and optimized content

modules/nixos/core/boot.nix

@@ -0,0 +1,22 @@
+# 引导配置
+{ config, lib, pkgs, ... }:
+
+{
+  boot = {
+    loader = {
+      efi = {
+        canTouchEfiVariables = true;
+        efiSysMountPoint = "/boot";
+      };
+
+      grub = {
+        enable = true;
+        efiSupport = true;
+        device = "nodev";
+      };
+    };
+
+    # Allow to modify store. It's dangerous!!
+    readOnlyNixStore = lib.mkDefault true;
+  };
+}