Add comprehensive Warehouse13 Helm chart with configurable images

Features:
- Complete Helm chart at helm/warehouse13/ with Warehouse13 branding
- Configurable images for all components (PostgreSQL, MinIO, API, Frontend)
- Support for 3 deployment scenarios: dev, production, air-gapped
- 14 Kubernetes templates: Deployments, StatefulSets, Services, Ingress
- Persistent storage with configurable storage classes
- Health checks for all services
- Ingress with TLS support
- Security contexts and RBAC
- Comprehensive documentation:
  - HELM-DEPLOYMENT.md (main Kubernetes guide)
  - helm/warehouse13/README.md (full chart docs)
  - helm/warehouse13/QUICKSTART.md (5-min deployment)
  - Example values files (dev, production, air-gapped)
- Updated main README.md with Helm deployment instructions
- Marked old helm chart as deprecated

All component images fully configurable via values.yaml:
- postgres:15-alpine
- minio/minio:latest
- warehouse13/api:latest
- warehouse13/frontend:latest

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

helm/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v2
-name: datalake
-description: Test Artifact Data Lake - Store and query test artifacts
+name: warehouse13
+description: Warehouse13 - Enterprise Test Artifact Storage (Legacy Chart - Use ./warehouse13 instead)
 type: application
 version: 1.0.0
 appVersion: "1.0.0"
@@ -8,6 +8,7 @@ keywords:
   - testing
   - artifacts
   - storage
-  - data-lake
+  - datalake
+deprecated: true
 maintainers:
-  - name: Your Team
+  - name: Warehouse13 Team