Reorganize: Move all skills to skills/ folder

- Created skills/ directory
- Moved 272 skills to skills/ subfolder
- Kept agents/ at root level
- Kept installation scripts and docs at root level

Repository structure:
- skills/           - All 272 skills from skills.sh
- agents/           - Agent definitions
- *.sh, *.ps1       - Installation scripts
- README.md, etc.   - Documentation

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

skills/plugins/claude-hud/SECURITY.md

@@ -0,0 +1,12 @@
+# Security Policy
+
+## Supported Versions
+
+Security fixes are applied to the latest release series only.
+
+## Reporting a Vulnerability
+
+Please report security issues to: jarrodwttsyt@gmail.com
+
+Include a clear description, reproduction steps, and any relevant logs or screenshots.
+We will acknowledge receipt within 5 business days and provide a timeline for a fix if applicable.