feat: Support for Security Hub

[kaykhan]

Description

Adding support for parsing of security hub messages into a readable slack message.

{
  "detail-type": ["Security Hub Findings - Imported"],
  "source": ["aws.securityhub"]
}

Examples:

Motivation and Context

#207
#221

Breaking Changes

None

How Has This Been Tested?

• I have updated at least one of the examples/* to demonstrate and validate my change(s)
• I have tested and validated these changes using one or more of the provided examples/* projects

• I have executed pre-commit run -a on my pull request

[github-actions]

This PR has been automatically marked as stale because it has been open 30 days
with no activity. Remove stale label or comment or this PR will be closed in 10 days

[kaykhan]

This is ready for a review

[bryantbiggs]

CI failed check needs to be remediated

[kaykhan]

CI failed check needs to be remediated

Fixed the majority of them - some of the linting issue i believe are not a result of my changes. Especially

/notify_slack.py:506:1: C901 'get_slack_message_payload' is too complex (11)

[github-actions]

This PR has been automatically marked as stale because it has been open 30 days
with no activity. Remove stale label or comment or this PR will be closed in 10 days

[kaykhan]

Not stale: Looking for feedback on what to do regarding the changes that were made outside of this PR which are breaking the CI