Ensure intelligent threat detection is enabled for all regions via AWS GuardDuty Detector

AWS GuardDuty service is disabled. This may keep AWS resources vulnerable against malware and other more advanced threat actors.

In AWS Console -

1. Sign in to AWS Console and go to the GuardDuty console.
2. Click on Get Started.
3. Select Enable GuardDuty.

In Terraform -

1. In the aws_guardduty_detector resource, set the enabled field to true.

References:
https://docs.aws.amazon.com/guardduty/latest/ug/what-is-guardduty.html
https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/guardduty_detector