Add API7 ADC integration to Helm chart for automatic gateway configuration

- Added ADC (API7 Declarative CLI) post-install job for automatic gateway setup
- Created ConfigMap with complete API7 routing and service configuration
- Integrated cert-manager for automatic TLS certificate management
- Added support for Kubernetes service discovery
- Implemented auto-publish feature for routes after deployment
- Added comprehensive API7 plugin configurations (rate limiting, CORS, auth)
- Created RBAC resources for ADC job to access cluster resources
- Secured admin credentials using Kubernetes secrets
- Updated values.yaml with extensive API7 configuration options
- Enhanced documentation with API7 setup and troubleshooting guides

helm/api7ee/templates/certificate.yaml

@@ -0,0 +1,25 @@
+{{- if and .Values.api7.enabled .Values.api7.tls.enabled .Values.api7.tls.certManager.enabled }}
+apiVersion: cert-manager.io/v1
+kind: Certificate
+metadata:
+  name: {{ include "api7ee.fullname" . }}-tls
+  labels:
+    {{- include "api7ee.labels" . | nindent 4 }}
+spec:
+  secretName: {{ .Values.api7.tls.secretName | default (printf "%s-tls" (include "api7ee.fullname" .)) }}
+  issuerRef:
+    name: {{ .Values.api7.tls.certManager.issuer }}
+    kind: {{ .Values.api7.tls.certManager.issuerKind | default "ClusterIssuer" }}
+  commonName: {{ first .Values.api7.hosts }}
+  dnsNames:
+    {{- range .Values.api7.hosts }}
+    - {{ . | quote }}
+    {{- end }}
+  usages:
+    - digital signature
+    - key encipherment
+    - server auth
+    - client auth
+  duration: 2160h  # 90 days
+  renewBefore: 720h  # 30 days before expiry
+{{- end }}