feat: add cdk-self-destruct

[NimmLor]

cdk-self-destruct is an utility that enables you to schedule the destruction of cdk stacks while also destroying all associated resources.

It is inspired by cdk-time-bomb, but rewritten with aws-cdk v2 and it uses the new AWS EventBridge Scheduler.

It also allows you to automatically overwrite the RemovalPolicy of every resource in the stack, as well as to delete implicitly created resources or dependencies that prevent the resource from being deleted.

At this time this includes:

• Purging non-empty S3 buckets - this would otherwise cause the deployment to fail
• Cancelling running stepfunction executions - this would cause the deployment to wait until all executions are finished
• Deleting log groups created by aws lambda

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[NimmLor]

@kalaiser