feat: add Traefik ingress support

[ibourgeois]

Context

As a developer using Traefik, I need Beacon to generate ingress resources that work cleanly with Traefik so I can access deployed apps without manual port forwarding.

Acceptance Criteria

• generate Traefik-compatible ingress resources or annotations in the Helm chart
• support host-based routing for Laravel applications
• keep Traefik support compatible with Beacon TLS options
• add tests covering Traefik-specific chart output
• document any required Traefik assumptions

Notes

The initial target should support local cluster usage such as Rancher Desktop with Traefik.