Add Harden Windows to Security section

[pparage]

Adds Harden Windows to the Security section.

What it is: An interactive PowerShell TUI that audits and hardens 150+ Windows 10/11 privacy and security settings — covering telemetry, Defender ASR rules, NTLM, bloatware, and more. Single script, zero dependencies.

Why it's awesome:

• One-command audit shows a hardening score with color-coded results
• 14 Defender Attack Surface Reduction rules enabled in Block mode
• Based on CIS Benchmarks, Microsoft Security Baselines, and ACSC guidance
• Automatic backup before any changes, silent CLI mode for automation
• Actively maintained, MIT licensed

Checklist:

• Not a duplicate (no Windows hardening TUI in the current list)
• Added alphabetically in the Security section (between GlassWire and IIS Crypto)
• Follows format: * [Name](link) - Description. [![oss badge][oss]](source)
• Title-cased name
• Spelling and grammar checked
• Single item, single PR