Added Git secrets scanning tool

[Maha1503]

This PR adds Git Detector under the DevOps section.

Git Detector is a Python-based tool designed to scan entire Git repositories (including commit history) for potential sensitive data leaks such as:

• 🔑 Passwords
• 🗝️ API Keys (AWS, OpenAI, Google, etc.)
• 📄 RSA & SSH Private Keys
• 🔐 TLS/SSL Certificates
• 🗃️ Database Credentials

Key Features:

• Full Git history scan
• Color-coded results for easy analysis
• Simple pre-execution setup

GitHub Repo: [Git Detector](https://github.com/Maha1503/Git_detector)

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💡 Why Add This?

• Helps developers identify accidental credential leaks
• Enhances repository security with minimal setup
• Complements other security tools in the list

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🙌 Thank You!

Looking forward to your feedback! 🚀