refactor: Use haumea for filesystem-based module system for flake outputs

refactor: Use hyphen(`-`) for variable names & folder names(except Python), replace all unserscore(`_`) with hyphen(`-`).

hosts/idols-ai/secureboot.nix

@@ -0,0 +1,34 @@
+{
+  pkgs,
+  lib,
+  lanzaboote,
+  ...
+}: {
+  # How to enter setup mode - msi motherboard
+  ## 1. enter BIOS via [Del] Key
+  ## 2. <Advance mode> => <Settings> => <Security> => <Secure Boot>
+  ## 3. enable <Secure Boot>
+  ## 4. set <Secure Boot Mode> to <Custom>
+  ## 5. enter <Key Management>
+  ## 6. select <Delete All Secure Boot Variables>, and then select <No> for <Reboot Without Saving>
+  ## 7. Press F10 to saving and reboot.
+  imports = [
+    lanzaboote.nixosModules.lanzaboote
+  ];
+
+  environment.systemPackages = [
+    # For debugging and troubleshooting Secure Boot.
+    pkgs.sbctl
+  ];
+
+  # Lanzaboote currently replaces the systemd-boot module.
+  # This setting is usually set to true in configuration.nix
+  # generated at installation time. So we force it to false
+  # for now.
+  boot.loader.systemd-boot.enable = lib.mkForce false;
+
+  boot.lanzaboote = {
+    enable = true;
+    pkiBundle = "/etc/secureboot";
+  };
+}