Add Helm chart scaffold with Chart.yaml, values.yaml, helpers, and all templates

Adds full Helm chart for GroomBook including migration job (pre-install/pre-upgrade hook), CNPG cluster (operator mode), DragonflyDB (integrated + operator modes), API/web deployments, services, and ingress templates.

Resolves GRO-89.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

charts/groombook/templates/web-deployment.yaml

@@ -0,0 +1,47 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ include "groombook.fullname" . }}-web
+  labels:
+    {{- include "groombook.labels" . | nindent 4 }}
+    app.kubernetes.io/component: web
+spec:
+  replicas: {{ .Values.web.replicas }}
+  selector:
+    matchLabels:
+      {{- include "groombook.selectorLabels" . | nindent 6 }}
+      app.kubernetes.io/component: web
+  template:
+    metadata:
+      labels:
+        {{- include "groombook.selectorLabels" . | nindent 8 }}
+        app.kubernetes.io/component: web
+    spec:
+      {{- with .Values.imagePullSecrets }}
+      imagePullSecrets:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      serviceAccountName: {{ include "groombook.serviceAccountName" . }}
+      containers:
+        - name: web
+          image: {{ include "groombook.webImage" . }}
+          imagePullPolicy: {{ .Values.web.image.pullPolicy }}
+          ports:
+            - containerPort: 80
+              name: http
+              protocol: TCP
+          resources:
+            {{- toYaml .Values.web.resources | nindent 12 }}
+          readinessProbe:
+            httpGet:
+              path: /
+              port: 80
+            initialDelaySeconds: 5
+            periodSeconds: 10
+          livenessProbe:
+            httpGet:
+              path: /
+              port: 80
+            initialDelaySeconds: 10
+            periodSeconds: 30
+