feat: add Kubernetes deployment with ArgoCD

- Add k8s/ manifests (Deployment, Service, Ingress)
- Use Kustomize for configuration
- ArgoCD application for GitOps deployment
- Traefik ingress with Let's Encrypt TLS
- Deploy script for CI/CD workflow

Deploys to: https://whalehunting.kube2.tricnet.de

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

k8s/argocd-application.yaml

@@ -0,0 +1,20 @@
+apiVersion: argoproj.io/v1alpha1
+kind: Application
+metadata:
+  name: whalehunting
+  namespace: argocd
+spec:
+  project: default
+  source:
+    repoURL: http://gitea-http.gitea.svc.cluster.local:3000/admin/whalehunting.git
+    targetRevision: HEAD
+    path: k8s
+  destination:
+    server: https://kubernetes.default.svc
+    namespace: whalehunting
+  syncPolicy:
+    automated:
+      prune: true
+      selfHeal: true
+    syncOptions:
+      - CreateNamespace=true