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/kustomization.yaml

@@ -0,0 +1,17 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+namespace: whalehunting
+
+resources:
+  - namespace.yaml
+  - deployment.yaml
+  - service.yaml
+  - ingress.yaml
+
+commonLabels:
+  app.kubernetes.io/managed-by: argocd
+
+images:
+  - name: git.kube2.tricnet.de/admin/whalehunting
+    newTag: latest