feat(service): add support for whatsapp

[kkupreeva]

Description

Added support for WhatsApp

Fixes #62

Type of change

Please delete options that are not relevant.

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• Running existing tests
• Created new tests

Checklist:

• My code has been linted (make lint)
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have rebased my branch to include the latest changes from master

[kha7iq]

Thank you very much @kkupreeva for your contribution.
Before i merge i just want to know if you were able to send messages via whatsapp successfully?

[kkupreeva]

Unfortunately, when trying to test it I noticed some problems with go-whatsapp package like in these issues
1 and 2