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/namespace.yaml

@@ -0,0 +1,6 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: whalehunting
+  labels:
+    app.kubernetes.io/name: whalehunting