feat(security): implement comprehensive security scanner module

- Consolidated functionality from multiple security-related modules into a single SecurityScanner class.
- Added support for vulnerability detection, secrets scanning, compliance checking, and policy enforcement.
- Introduced configuration options for scan types, file filtering, and output formats.
- Implemented detailed logging and error handling throughout the scanning process.
- Added methods for generating reports and recommendations based on scan results.
- Included helper functions for quick scans and specific vulnerability checks.

Author: mdlmarkham