Add IngressClass resource and update references to spec.ingressClassName across templates, examples, and documentation for consistency and backward compatibility

- Introduced new IngressClass resource in Helm templates to define `easyhaproxy` as the default ingress class.
- Updated Kubernetes examples to replace `easyhaproxy-ingress` with `easyhaproxy` as the ingress class name.
- Enhanced processor logic to support both the new `spec.ingressClassName` field and the deprecated `kubernetes.io/ingress.class` annotation.
- Revised documentation to reflect the changes and ensure alignment with Kubernetes recommendations.

deploy/kubernetes/README.md

@@ -0,0 +1,91 @@
+# Kubernetes Static Manifests
+
+⚠️ **IMPORTANT**: These files are **auto-generated** from Helm templates. Do not edit them directly!
+
+## About These Files
+
+This directory contains pre-rendered Kubernetes manifests for deploying EasyHAProxy without Helm. These are generated from the Helm chart at `../../helm/easyhaproxy/` and provide three deployment options:
+
+| File                        | Type                   | Use Case                                                     |
+|-----------------------------|------------------------|--------------------------------------------------------------|
+| `easyhaproxy-daemonset.yml` | DaemonSet + hostPort   | Direct host networking, best for bare-metal or simple setups |
+| `easyhaproxy-nodeport.yml`  | Deployment + NodePort  | Exposes via NodePort (31080/31443/31936)                     |
+| `easyhaproxy-clusterip.yml` | Deployment + ClusterIP | Internal cluster access only, use with external LoadBalancer |
+
+## How to Use
+
+Choose the manifest that fits your deployment scenario:
+
+```bash
+# Option 1: DaemonSet mode (hostPort)
+kubectl apply -f easyhaproxy-daemonset.yml
+
+# Option 2: NodePort mode
+kubectl apply -f easyhaproxy-nodeport.yml
+
+# Option 3: ClusterIP mode
+kubectl apply -f easyhaproxy-clusterip.yml
+```
+
+For more details, see the [Kubernetes documentation](../../docs/kubernetes.md).
+
+## Regenerating These Files
+
+**When to regenerate:**
+- After modifying Helm chart templates (`helm/easyhaproxy/templates/`)
+- After updating default values (`helm/easyhaproxy/values.yaml`)
+- After a new release to sync with latest Helm chart
+
+**How to regenerate:**
+
+```bash
+# Navigate to helm directory
+cd helm
+
+# Generate DaemonSet manifest (hostPort mode)
+helm template ingress ./easyhaproxy --namespace easyhaproxy \
+  --set service.create=false \
+  > ../deploy/kubernetes/easyhaproxy-daemonset.yml
+
+# Generate NodePort manifest
+helm template ingress ./easyhaproxy --namespace easyhaproxy \
+  --set service.create=true \
+  --set service.type=NodePort \
+  > ../deploy/kubernetes/easyhaproxy-nodeport.yml
+
+# Generate ClusterIP manifest
+helm template ingress ./easyhaproxy --namespace easyhaproxy \
+  --set service.create=true \
+  --set service.type=ClusterIP \
+  > ../deploy/kubernetes/easyhaproxy-clusterip.yml
+```
+
+**Verify regeneration:**
+
+```bash
+# Check IngressClass is present
+grep "kind: IngressClass" ../deploy/kubernetes/easyhaproxy-*.yml
+
+# Validate manifest syntax
+kubectl apply --dry-run=client -f ../deploy/kubernetes/easyhaproxy-daemonset.yml
+```
+
+## What's Included
+
+Each manifest contains:
+- **ServiceAccount**: RBAC identity for EasyHAProxy
+- **ClusterRole**: Permissions to read Ingress resources and Secrets
+- **ClusterRoleBinding**: Binds the role to the service account
+- **IngressClass**: Defines `easyhaproxy` as the ingress class
+- **DaemonSet/Deployment**: The EasyHAProxy workload
+- **Service** (NodePort/ClusterIP only): Network exposure
+
+## Source of Truth
+
+The Helm chart at `../../helm/easyhaproxy/` is the **source of truth**. All changes should be made there, then these static manifests regenerated.
+
+**To modify these deployments:**
+1. Edit Helm templates in `helm/easyhaproxy/templates/`
+2. Update default values in `helm/easyhaproxy/values.yaml`
+3. Regenerate static manifests using commands above
+4. Commit both Helm changes and regenerated manifests