[Feature Request]: Add beem (former Bongo) SMS provider

[dmohns]

Preflight Checklist

• I have read the Contributing Guidelines for this project, if it exists.
• I agree to follow the Code of Conduct that this project adheres to.
• I have searched the issue tracker for a feature request that matches the one I want to file, without success.

Problem Description

beem (https://beem.africa/) is a common SMS provider. I would be great if we can integrate it into MPM

Proposed Solution

Integrate https://beem.africa/

Alternatives Considered

N/A

Additional Information

beem used to be called Bongo and was already integrated into MPM. Maybe certain code pieces can be re-used.