Add health monitoring integration to setup wizard

Changes:
- Add Step 6 to setup wizard: Automated health monitoring via cron
- Provide copy-paste ready crontab entry (every 15 minutes)
- Logs health checks to ~/.gcode_health.log

This makes users aware of the check_gcode_monitor.sh script and provides
an easy way to set up automated monitoring during initial setup.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

Author: mlugo-apx

setup_wizard.sh

@@ -257,6 +257,10 @@ echo
 echo "5. Install as systemd service (optional):"
 echo "   ${YELLOW}./install_service.sh${NC}"
 echo
+echo "6. Set up automated health monitoring (optional):"
+echo "   ${YELLOW}crontab -e${NC}"
+echo "   ${YELLOW}*/15 * * * * $(pwd)/check_gcode_monitor.sh >> \$HOME/.gcode_health.log 2>&1${NC}"
+echo
 echo -e "${GREEN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
 echo -e "${GREEN}✓ Setup complete! Happy printing! 🖨️${NC}"
 echo -e "${GREEN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"