feat(add): Module Campaign

[caioagiani]

Module Campaign

This module contains functions for creating SMS campaigns, adding recipients to them using one of the possible ways, launching a campaign, deleting of irrelevant campaigns, reviewing the list of campaigns and searching on them.

• [ ] Campaign#AddRecipients
• [ ] Campaign#Create
• [ ] Campaign#Delete
• [ ] Campaign#Get
• [ ] Campaign#GetInfo
• [ ] Campaign#GetLinks
• [ ] Campaign#List
• [ ] Campaign#Send