feat(settings-audit): Add Claude Code settings optimizer skill

- Add new 00-claude-code-setting skill for token usage optimization
- Includes audit scripts for MCP servers, CLAUDE.md, and extensions
- Auto-fix capability with backup for serverInstructions and frontmatter
- Add YAML frontmatter to 17 command files
- Target: keep baseline under 30% of 200K context limit

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

custom-skills/00-claude-code-setting/code/install.sh

@@ -0,0 +1,68 @@
+#!/bin/bash
+# Claude Code Settings Optimizer - Installation Script
+
+set -e
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+CLAUDE_DIR="${HOME}/.claude"
+
+echo "Claude Code Settings Optimizer - Installer"
+echo "==========================================="
+echo ""
+
+# Create directories
+echo "Creating directories..."
+mkdir -p "${CLAUDE_DIR}/commands"
+mkdir -p "${CLAUDE_DIR}/scripts/settings-audit"
+mkdir -p "${CLAUDE_DIR}/references"
+
+# Install command
+echo "Installing /settings-audit command..."
+cp "${SCRIPT_DIR}/commands/settings-audit.md" "${CLAUDE_DIR}/commands/"
+
+# Install scripts
+echo "Installing scripts..."
+cp "${SCRIPT_DIR}/scripts/"*.py "${CLAUDE_DIR}/scripts/settings-audit/"
+chmod +x "${CLAUDE_DIR}/scripts/settings-audit/"*.py
+
+# Install references
+echo "Installing references..."
+cp "${SCRIPT_DIR}/references/"*.md "${CLAUDE_DIR}/references/"
+
+# Check Python
+echo ""
+echo "Checking Python..."
+if command -v python3 &> /dev/null; then
+    echo "  Python 3: $(python3 --version)"
+else
+    echo "  Warning: Python 3 not found"
+fi
+
+# Check PyYAML (optional)
+if python3 -c "import yaml" 2>/dev/null; then
+    echo "  PyYAML: installed"
+else
+    echo "  PyYAML: not installed (optional)"
+    echo "  Install with: pip3 install pyyaml"
+fi
+
+echo ""
+echo "Installation complete!"
+echo ""
+echo "Installed to:"
+echo "  Command:    ${CLAUDE_DIR}/commands/settings-audit.md"
+echo "  Scripts:    ${CLAUDE_DIR}/scripts/settings-audit/"
+echo "  References: ${CLAUDE_DIR}/references/"
+echo ""
+echo "Usage:"
+echo "  In Claude Code: /settings-audit"
+echo ""
+echo "  Or run directly:"
+echo "  python3 ${CLAUDE_DIR}/scripts/settings-audit/run_audit.py"
+echo ""
+echo "  Auto-fix (preview):"
+echo "  python3 ${CLAUDE_DIR}/scripts/settings-audit/auto_fix.py"
+echo ""
+echo "  Auto-fix (apply):"
+echo "  python3 ${CLAUDE_DIR}/scripts/settings-audit/auto_fix.py --apply"
+echo ""