Add AWS CloudWatch Alarm Event

[AzlinII]

Is your feature request related to a problem? Please describe.
I want to create a lambda for an AWS CloudWatch Alarm Event. I'm not able to find anything that seems to indicate there is already a struct that exists for the lambda handler to map the event automatically.

Describe the solution you'd like
I would like to have a struct created that allows the lambda handler event to map AWS CloudWatch Alarm events like the ones produced here: https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/AlarmThatSendsEmail.html#alarms-and-actions.

Describe alternatives you've considered
If there are alternative ways of doing this without me having to define my own struct for this, I'm open to using that instead.

Additional context
Add any other context or screenshots about the feature request here.