Rename Helm chart to api7ee-demo-k8s

- Changed chart name from api7ee to api7ee-demo-k8s in Chart.yaml
- Renamed helm/api7ee directory to helm/api7ee-demo-k8s
- Updated all references in build.yml workflow
- Updated all references in helm-release.yml workflow
- Updated main README.md with new chart name
- Updated Helm chart README with new chart name
- Verified all old references have been replaced
- Chart packages correctly as api7ee-demo-k8s-{version}.tgz

helm/api7ee-demo-k8s/templates/secret-api7.yaml

@@ -0,0 +1,14 @@
+{{- if .Values.api7.enabled }}
+apiVersion: v1
+kind: Secret
+metadata:
+  name: {{ include "api7ee.fullname" . }}-api7-admin
+  labels:
+    {{- include "api7ee.labels" . | nindent 4 }}
+    app.kubernetes.io/component: api7
+type: Opaque
+stringData:
+  admin-key: {{ .Values.api7.gateway.adminKey | quote }}
+  admin-url: {{ .Values.api7.gateway.adminUrl | quote }}
+  gateway-group: {{ .Values.api7.gateway.group | default "default" | quote }}
+{{- end }}