[ADD] Add traefik support

[ascalotoru]

Summary

This PR adds optional support for Traefik by introducing a new IngressRoute template.
Charts can now render either a standard Kubernetes Ingress or a Traefik IngressRoute, depending on configuration.

Key Changes

Added ingress_route.yaml to render a traefik.io/v1alpha1 IngressRoute when ingress.traefik.enabled = true.

Updated ingress.yaml to render only when Traefik is disabled.

Extended values.yaml with:

ingress.traefik.enabled
ingress.traefik.entryPoint

Added fallback logic for service name and port, with clear failures when missing.

Why

Allows deployments using Traefik to work natively with its CRDs while keeping full backward compatibility for environments using standard Ingress controllers.

Compatibility

No breaking changes.

Existing setups using NGINX or other Ingress controllers continue working without modifications.

[coderabbitai]

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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