feat: add domain attribute in routes registry

[densetsuuu]

Add domain property to route definitions

Closes #85

Summary

This change adds the domain property to the generated route registry and the AdonisEndpoint type, allowing Tuyau to be aware of which domain each route belongs to (e.g. 'root', 'api', etc.).

Testing

• Added a new api.v1.teste test fixture with domain: 'api' to cover non-root domain routes
• Added a Client | Registry domain test group with two cases:
  • Verifies that domain-scoped routes expose their correct domain (e.g. 'api')
  • Verifies that routes without an explicit domain default to 'root'

Aim

Previously, all routes were treated as belonging to the 'root' domain regardless of their actual AdonisJS domain configuration. This made it impossible to distinguish routes defined under different domains (e.g. router.group(() => { ... }).domain('api')). With this change, the domain information flows through from AdonisJS route scanning to the generated registry and into the client, enabling domain-aware route resolution.

[densetsuuu]

Sorry @Julien-R44, the PR is a little bit bloated because I had to update the fixtures and scripts too ahah