feat: Mshta suspicious files Execution

[swachchhanda000]

Summary of the Pull Request

Added more suspicious extension execution by mshta. Additional extensions were included because many malware variants are increasingly using alternative file types to evade detection. These extensions are often abused to launch malicious scripts through mshta.

Changelog

update: MSHTA Execution with Suspicious File Extensions - title changed and more susp extension added

Example Log Event

Fixed Issues

SigmaHQ Rule Creation Conventions

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

[phantinuss]

please sort the list and don't remove the comments of exe/chm. Also: Is there a reason on why you removed dll and lnk?