🔒 Add Security Best Practices Documentation

## Description
Create comprehensive security guidelines for using Kali Linux tools responsibly and legally.

## Tasks
- [ ] Document ethical hacking principles
- [ ] Add legal disclaimers and warnings
- [ ] Create responsible usage guidelines
- [ ] Include case studies of proper usage
- [ ] Add resources for learning cybersecurity ethics
- [ ] Create SECURITY.md file

## Expected Outcome
Clear guidelines ensuring users understand legal and ethical implications.

## Skills Required
- Technical writing
- Cybersecurity knowledge
- Legal awareness (helpful)

## Difficulty Level
🟡 Intermediate

---
*Hacktoberfest 2025 - Security documentation*