Added bootstrap folder and gateway controller

cluster/bootstrap/gatewayclass.yaml

@@ -0,0 +1,15 @@
+# ------------------------------------------------------------------------------
+# Cilium GatewayClass
+#
+# Applied once during cluster bootstrap — before ArgoCD takes over.
+# The Cilium operator manages this object once created but does NOT
+# auto-create it. Must exist before any Gateway or HTTPRoute resources.
+#
+# Apply: kubectl apply -f cluster/bootstrap/gatewayclass.yaml
+# ------------------------------------------------------------------------------
+apiVersion: gateway.networking.k8s.io/v1
+kind: GatewayClass
+metadata:
+  name: cilium
+spec:
+  controllerName: io.cilium/gateway-controller