feat: port useOrigin method from Laravel

[binaryfire]

Summary

Ports the useOrigin() method from Laravel's UrlGenerator to Hypervel, enabling the setting of a forced root URL for all generated URLs.

This is used for multi-tenancy where URLs need to be generated for tenant-specific domains.

Usage (in middleware)

  URL::useOrigin('https://tenant1.example.com');
  url('dashboard'); // https://tenant1.example.com/dashboard

  // Clear
  URL::useOrigin(null);

Implementation

Uses coroutine Context instead of instance properties for request isolation