Add plugin health monitoring system with alerts and tests

Implement comprehensive plugin health monitoring including metrics collection, status determination, and alerting. Add middleware for request tracking, service provider integration, and console commands for health checks. Include unit and feature tests for all components.

Add configuration options for thresholds and alert channels. Implement caching for performance and add detailed health reports. Support JSON output and watch mode in console command.

Fix various code style issues and add Laravel Pint for consistent formatting. Update composer dependencies and ensure proper error handling throughout the system.