Fixes #230

This PR adds a new test file determinism_new.rs that uses a more maintainable approach for testing localization with deterministic tests. The key improvements are:

1. Added a new l10d variant to the check_determinism macro that makes it easier to test multiple locales at once
2. Structured the tests to make it easier to add new locales in the future
3. All tests are passing and maintain the same functionality as the original tests

This approach makes it much easier to add new locales to the tests in the future, as you only need to add a new locale parameter to the l10d macro pattern.