[add:email.php, SendEMail.php] Configure Email service for the System

Configure the email sending capabilities for the MoDACA system. Added
the config data to email.php and Created the class SendEmail to handle
email sending.
[mod:ctp, php] Create email sending functionality and responsive email

Create the function to send an email when the account is verified and
create the responsive HTML email. An email is sent to the user to notify
the user that the account is verified.