move i18n config to module

nixos/modules/i18n.nix

@@ -0,0 +1,54 @@
+{
+  pkgs,
+  outputs,
+  lib,
+  config,
+  ...
+}:
+let
+  cfg = config.youthlic.i18n;
+in
+{
+  options = {
+    youthlic.i18n = {
+      enable = lib.mkEnableOption "zh env";
+    };
+  };
+  config = lib.mkIf cfg.enable {
+    i18n = {
+      defaultLocale = "C.UTF-8";
+      extraLocaleSettings = {
+        LC_ADDRESS = "zh_CN.UTF-8";
+        LC_IDENTIFICATION = "zh_CN.UTF-8";
+        LC_MEASUREMENT = "zh_CN.UTF-8";
+        LC_MONETARY = "zh_CN.UTF-8";
+        LC_NAME = "zh_CN.UTF-8";
+        LC_NUMERIC = "zh_CN.UTF-8";
+        LC_PAPER = "zh_CN.UTF-8";
+        LC_TELEPHONE = "zh_CN.UTF-8";
+        LC_TIME = "zh_CN.UTF-8";
+      };
+      inputMethod = {
+        enable = true;
+        type = "fcitx5";
+        fcitx5 = {
+          addons = with pkgs; [
+            libsForQt5.fcitx5-qt
+            fcitx5-gtk
+            fcitx5-configtool
+            fcitx5-chinese-addons
+            (fcitx5-rime.override {
+              rimeDataPkgs = (
+                with (outputs.packages."${pkgs.system}");
+                [
+                  rime-ice
+                ]
+              );
+            })
+          ];
+          waylandFrontend = true;
+        };
+      };
+    };
+  };
+}