Set Up Middleware for the Application

[niden]

Set up and configure foundational middleware for the phalcon/rest-api-v6 application.

Middleware to implement:

• Health check middleware (e.g., /health endpoint for service status)
• 404 middleware for handling requests to undefined routes
• CORS middleware for managing cross-origin requests, allowed origins, headers, and methods
• JWT existence middleware to ensure requests contain a JWT
• JWT structure verification middleware to validate JWT format prior to authentication

Tasks:

• Implement and register each middleware component
• Integrate middleware into the application's request lifecycle
• Add error handling and response messaging
• Document setup and configuration for each middleware

Benefits:

• Strengthens API security, reliability, and accessibility
• Provides clear error and health reporting
• Establishes a foundation for authentication and authorization

[niden]

Resolved in #13