RELIC: Implement Routing Functionality

[klkucaj]

Is your feature request related to a problem? Please describe.
The framework currently lacks built-in routing functionality, making it difficult to define and handle routes in a structured and scalable way. Developers need a robust routing mechanism to map HTTP requests to specific handlers efficiently.

Describe the solution you'd like
Introduce a routing system with the following features:

• Support for defining routes with HTTP methods (e.g., GET, POST, PUT, DELETE).
• Route parameter handling (e.g., /users/:id).
• Middleware support for pre- and post-route execution.
• Nested or grouped routes for better organization.
• Error handling for undefined or invalid routes.

Describe alternatives you've considered

• Using external routing libraries, which can work but adds unnecessary dependencies and reduces the framework's cohesiveness.

Additional context
A built-in routing system will provide a seamless experience for developers and align the framework with common practices in modern web development. It will also improve the maintainability and scalability of applications built with this framework.