Adding a sample unit test for module:mod_comm_send

[Adity20]

Is your feature request related to a problem? Please describe.
The AI VPN project currently lacks a comprehensive suite of unit tests.

Describe the solution you'd like
Adding a unit test for the module mod_comm_send. Currently this module is not having any sort of unit test to assert the proper working of the send_mime_msg_via_email and telegram functions.

The unit tests will include:
Asserting the functions written in the module whether they are working properly or not.
Like if the function is correctly sending the message with appropriate attachments and message or not.