feat: Add 6 new Claude Code skills

Skills added:
- 🔐 Secret Scanner: Detect leaked credentials in codebases
- 🏛️ Git Archaeologist: Analyze git history, find bugs
- 💾 Backup Automator: Automated encrypted cloud backups
- 🌐 Domain Manager: Unified DNS management
- 🔒 SSL Guardian: Certificate automation and monitoring
- 📡 Log Sentinel: Log analysis and anomaly detection

All skills include:
- SKILL.md with trigger patterns
- README.md with documentation
- GLM 5 attribution and disclaimer

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

skills/secret-scanner/README.md

@@ -0,0 +1,54 @@
+<div align="center">
+
+# 🔐 Secret Scanner
+
+### Detect Leaked Credentials Before They Exploit You
+
+---
+
+<p align="center">
+  <a href="https://z.ai/subscribe?ic=R0K78RJKNW">
+    <img src="https://img.shields.io/badge/Designed%20by-GLM%205%20Advanced%20Coding%20Model-blue?style=for-the-badge" alt="Designed by GLM 5">
+  </a>
+</p>
+
+<p align="center">
+  <i>✨ Autonomously developed by <a href="https://z.ai/subscribe?ic=R0K78RJKNW"><strong>GLM 5 Advanced Coding Model</strong></a></i>
+</p>
+
+<p align="center">
+  <b>⚠️ Disclaimer: Test in a test environment prior to using on any live system</b>
+</p>
+
+</div>
+
+## Overview
+
+Scans codebases for leaked API keys, passwords, tokens, private keys, and connection strings.
+
+## Detected Secrets
+
+- AWS Access Keys, GitHub Tokens, Google API Keys
+- Stripe Keys, Slack Tokens
+- Private SSH Keys, PGP Keys
+- Database connection strings
+- Hardcoded passwords
+
+## Quick Start
+
+```bash
+# Install gitleaks
+sudo apt install -y gitleaks
+
+# Scan current directory
+gitleaks detect --source . --verbose
+
+# Scan git history
+gitleaks detect --source . --log-opts="--all"
+```
+
+---
+
+<p align="center">
+  <a href="https://z.ai/subscribe?ic=R0K78RJKNW">Learn more about GLM 5</a>
+</p>