Migrate all service modules from nginx-ingress to Traefik

- Remove nginx-specific ingress variables (use_proxy_protocol, proxy_timeout, additional_configuration_snippet)
- Update ingress annotations to use Traefik middleware CRDs
- Delete nginx-ingress module (replaced by traefik)
- Add new traefik middleware.tf for shared middleware definitions
- Update service modules to work with new ingress_factory interface

modules/kubernetes/homepage/values.yaml

@@ -45,7 +45,7 @@ ingress:
       gethomepage.dev/description: "A modern, secure, highly customizable application dashboard."
       gethomepage.dev/group: "A New Group"
       gethomepage.dev/icon: "homepage.png"
-    ingressClassName: "nginx"
+    ingressClassName: "traefik"
     hosts:
       - host: &host "home.viktorbarzin.me"
         paths: