New Feature: Birthdays

[EmilioGerdez]

Greetings,
just wanna let you all know that soon I will be making a pull request to add the birthday's feature,
mainly I want it to associate a birthday's date to the telegram members "@" so it can congratulate them,
let me know if you want anything specific to be included in this feature

[Euler-B]

This functionality will be part of a feature that we are considering implementing called Event-Calendar.