rework modules

Signed-off-by: unexplrd <unexplrd@linerds.us>

modules/nixos/system/locale.nix

@@ -0,0 +1,36 @@
+{
+  config,
+  lib,
+  ...
+}: let
+  inherit (lib) types mkOption;
+in {
+  options = {
+    module.locale = mkOption {
+      type = types.strMatching "[a-z]{2}_[A-Z]{2}\\.UTF-8";
+      default = "en_US.UTF-8";
+      description = "set locale";
+    };
+  };
+  config = {
+    i18n = let
+      inherit (config.module) locale;
+    in {
+      defaultLocale = locale;
+      extraLocaleSettings = {
+        LC_ADDRESS = locale;
+        LC_COLLATE = "en_US.UTF-8";
+        LC_CTYPE = locale;
+        LC_IDENTIFICATION = locale;
+        LC_MEASUREMENT = locale;
+        LC_MESSAGES = locale;
+        LC_MONETARY = locale;
+        LC_NAME = locale;
+        LC_NUMERIC = locale;
+        LC_PAPER = locale;
+        LC_TELEPHONE = locale;
+        LC_TIME = locale;
+      };
+    };
+  };
+}