Add new rule Email Forwarding Rule - Exchange

[dan21san]

Summary of the Pull Request

Add a new rule about the creation of rules to forward email on Microsoft Exchange.

Changelog

update: Mail Forwarding/Redirecting Activity In O365 - Add additional parameters to increase coverage

Example Log Event

Here https://learn.microsoft.com/en-us/purview/audit-troubleshooting-scenarios some example logs.

Fixed Issues

SigmaHQ Rule Creation Conventions

• If your PR adds new rules, please consider following and applying these conventions

[frack113]

Seen to be a duplucate of https://github.com/SigmaHQ/sigma/blob/master/rules-threat-hunting/cloud/m365/audit/microsoft365_susp_email_forwarding_activity.yml