feat: add Windows audit policy analyzer with CIS/STIG baseline

[0xPrashanthSec]

Summary

• Adds Windows/AuditPolicyAnalysis/Get-AuditPolicyAnalysis.ps1, a self-contained PowerShell tool for auditing Windows audit policy against CIS Benchmark / DISA STIG standards
• Parses live auditpol /get /category:* /r output into structured objects and compares against a 3-tier baseline (MUST_ENABLE, CONDITIONAL, NOISY_SKIP)
• Outputs a color-coded console report (Green/Yellow/Red), exports a per-host CSV, and auto-generates a Fix-AuditPolicy.ps1 remediation script for MUST_ENABLE gaps
• Supports -WhatIf flag to run analysis-only without writing the fix script
• Requires elevation (#Requires -RunAsAdministrator)
• Author credits and CIS/STIG reference links added to .NOTES block

Test plan

• Run on a Windows Server 2022 host as Administrator: .\Get-AuditPolicyAnalysis.ps1
• Confirm color-coded output groups by Category with correct status labels
• Verify AuditPolicy_Report_<hostname>_<date>.csv is created with all subcategories
• Verify Fix-AuditPolicy.ps1 contains only MUST_ENABLE NOT_CONFIGURED/PARTIAL items
• Run with -WhatIf and confirm no fix script is generated
• Run Fix-AuditPolicy.ps1 and re-run the analyzer — confirm gaps become COMPLIANT