refactor: simplify k8s deployment to pure kubectl

- Remove kustomization.yaml and all kustomize references
- Remove deploy-pi.sh and vpa-pi-helper.sh helper scripts
- Remove redundant ConfigMap from vpa.yaml
- Update README.md to focus on standard kubectl commands
- Keep deployment simple with just YAML files and kubectl
- Maintain Pi 5 optimizations and VPA functionality
- No complex tooling required for deployment

k8s/vpa.yaml

@@ -0,0 +1,29 @@
+apiVersion: autoscaling.k8s.io/v1
+kind: VerticalPodAutoscaler
+metadata:
+  name: unitforge-vpa
+  labels:
+    app: unitforge
+    component: vpa
+    platform: raspberry-pi
+spec:
+  targetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: unitforge
+  updatePolicy:
+    updateMode: "Auto"
+    minReplicas: 1
+  resourcePolicy:
+    containerPolicies:
+      - containerName: unitforge
+        # Pi 5 optimized resource bounds
+        minAllowed:
+          cpu: 50m
+          memory: 64Mi
+        maxAllowed:
+          cpu: 500m # Conservative limit for Pi 5
+          memory: 512Mi # Pi 5 can handle this but keep reasonable
+        # Controlled resource recommendations for Pi hardware
+        controlledResources: ["cpu", "memory"]
+        controlledValues: Requests