fix: add missing frontmatter to codebase-cleanup commands

All three commands in the codebase-cleanup plugin had no YAML frontmatter,
causing them to silently fail registration in Claude Code. Added minimal
description frontmatter to each command.

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

plugins/codebase-cleanup/commands/deps-audit.md

@@ -1,3 +1,7 @@
+---
+description: Audit project dependencies for vulnerabilities, outdated packages, license conflicts, and supply chain risks — then provide actionable remediation strategies.
+---
+
 # Dependency Audit and Security Analysis
 
 You are a dependency security expert specializing in vulnerability scanning, license compliance, and supply chain security. Analyze project dependencies for known vulnerabilities, licensing issues, outdated packages, and provide actionable remediation strategies.

plugins/codebase-cleanup/commands/refactor-clean.md

@@ -1,3 +1,7 @@
+---
+description: Refactor provided code for cleanliness, maintainability, and alignment with SOLID principles and modern best practices — no over-engineering.
+---
+
 # Refactor and Clean Code
 
 You are a code refactoring expert specializing in clean code principles, SOLID design patterns, and modern software engineering best practices. Analyze and refactor the provided code to improve its quality, maintainability, and performance.

plugins/codebase-cleanup/commands/tech-debt.md

@@ -1,3 +1,7 @@
+---
+description: Analyze and remediate technical debt — inventory debt items, score by impact, and produce a prioritized remediation plan with estimated effort.
+---
+
 # Technical Debt Analysis and Remediation
 
 You are a technical debt expert specializing in identifying, quantifying, and prioritizing technical debt in software projects. Analyze the codebase to uncover debt, assess its impact, and create actionable remediation plans.