refactor: make the whole thing more generic

modules/nixos/locales/theaninova.nix

@@ -0,0 +1,32 @@
+{ pkgs, lib, config, ... }:
+with lib;
+
+let cfg = config.locale.preset.theaninova;
+
+in {
+  options.locale.preset.theaninova = {
+    enable = mkEnableOption "Enable the locale preset for Theaninova";
+  };
+
+  config = mkIf cfg.enable {
+    time.timeZone = "Europe/Berlin";
+    i18n = {
+      inputMethod = {
+        enabled = "ibus";
+        ibus.engines = [ pkgs.ibus-engines.anthy ];
+      };
+      defaultLocale = "en_GB.UTF-8";
+      extraLocaleSettings = {
+        LC_ADDRESS = "de_DE.UTF-8";
+        LC_IDENTIFICATION = "de_DE.UTF-8";
+        LC_MEASUREMENT = "de_DE.UTF-8";
+        LC_MONETARY = "de_DE.UTF-8";
+        LC_NAME = "de_DE.UTF-8";
+        LC_NUMERIC = "de_DE.UTF-8";
+        LC_PAPER = "de_DE.UTF-8";
+        LC_TELEPHONE = "de_DE.UTF-8";
+        LC_TIME = "de_DE.UTF-8";
+      };
+    };
+  };
+}