Create a simple service that send an email to user

[Nishit-Gopani]

• Fetch template from DB

[shah-tejas]

Create a service method that allows to send any email. The service method takes the following input:

• List of email receivers
• Which sender email to use
• Email Subject & Body (optional - Email Template code)

Create Integration test to test successful email delivery, and graceful error handling for invalid email addresses.