Add completion cleanup script and deploy refined shell config

🧹 Completion system maintenance:
- Remove old Mullvad VPN completion files
- Clear completion cache for fresh start
- Check for NordVPN completion availability

🚀 Deployment successful:
- Backed up original .zshrc
- Symlinked refined modular configuration
- Git hooks configured globally
- All scripts and configs linked

System now running with enhanced durability principles! 🎯

🤖 Generated with Claude Code (https://claude.ai/code)

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

.gitconfig

@@ -12,3 +12,5 @@
 	required = true
 [url "git@github.com:"]
 	insteadOf = https://github.com/
+[core]
+	hooksPath = /Users/davidglidden/dotfiles/git/hooks

scripts/cleanup-completions.sh

@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+# Clean up old completion files
+
+echo "🧹 Cleaning up old completion files..."
+
+# Remove old Mullvad completion (requires sudo)
+if [[ -f "/usr/local/share/zsh/site-functions/_mullvad" ]]; then
+    echo "Removing old Mullvad completion file..."
+    sudo rm -f /usr/local/share/zsh/site-functions/_mullvad
+    echo "✅ Mullvad completion removed"
+else
+    echo "✅ Mullvad completion already cleaned"
+fi
+
+# Check for NordVPN completion
+if [[ -f "/opt/homebrew/share/zsh/site-functions/_nordvpn" ]]; then
+    echo "✅ NordVPN completion available"
+elif command -v nordvpn >/dev/null 2>&1; then
+    echo "⚠️  NordVPN installed but completion missing"
+    echo "💡 Try: nordvpn completion zsh > /opt/homebrew/share/zsh/site-functions/_nordvpn"
+else
+    echo "ℹ️  NordVPN not detected via CLI"
+fi
+
+# Clear any remaining completion cache
+rm -f ~/.zcompdump*
+echo "✅ Completion cache cleared"
+
+echo "🎉 Completion cleanup complete!"
+echo "💡 Restart your shell to regenerate completions"