refactor(flake-parts): initial flake-parts configuration

inputs/system/modules/base/locale/default.nix

@@ -0,0 +1,17 @@
+{ lib, ... }: 
+
+let
+  inherit (lib) mkDefault;
+in
+
+{
+  i18n = {
+    defaultLocale = mkDefault "en_US.UTF-8";
+    supportedLocales = mkDefault [
+      "en_US.UTF-8/UTF-8"
+    ];
+  };
+  time.timeZone = mkDefault "Pacific/Auckland";
+  location.provider = "geoclue2";
+  services.geoclue2.enable = true;
+}