Support for Bpost BE

### Prerequisites

- [x] The information provided below is, to my knowledge, correct.
- [x] I verify that I have searched through the existing issues and that this issue is not a duplicate.

### Tracking page

https://track.bpost.cloud

### Developer documentation page

https://github.com/Antidot-be/bpost-api-library

### Additional context

Would be nice if you could add Bpost from Belgium

Start by reviewing the Bpost tracking page and the linked developer documentation at github.com/Antidot-be/bpost-api-library, then inspect the repository's existing carrier integrations to find the appropriate entry point. Done means parcels from Bpost Belgium can be added and tracked consistently with the app's other supported carriers.

Written by the indexing model from the issue text.