Clarify Bengali localization contribution path and inactive Transifex link

Context

I would like to contribute Bengali (Bangla, bn) localization and proofreading for the Navigation SDK for Android.

The current contribution guide directs translators to:

https://www.transifex.com/mapbox/mapbox-navigation-sdk-for-android/

However, that URL currently returns a 404 page. I also could not find values-bn resources in the current main branch.

At the same time, the current Navigation SDK localization documentation lists Bengali as supported for user-interface elements:

https://docs.mapbox.com/android/navigation/guides/localization/

Questions

1. Is Bengali UI localization currently distributed from a source outside this repository?
2. What is the current translation platform or project URL for contributing Bengali translations?
3. If Bengali translations need to be restored or updated, would the maintainers welcome a Bengali translation/proofreading contribution?
4. Should new translations target all resources listed in .tx/config, or is there a newer localization workflow?

I am a native Bengali speaker from Bangladesh and would be happy to translate and review the navigation terminology carefully once the supported contribution workflow is confirmed.

Begin with the contribution guide and .tx/config, then compare them with the localization guide linked in the report. Confirm the supported Bengali workflow and translation URL with maintainers; done means the guide and link describe an agreed current path and Bengali status.