feat: update kustomization to include new namespaces and charts

Removes deprecated resources and adds new namespaces for 
external-secrets, cert-manager, and ingress-nginx. Updates 
kustomization to include helm charts for cert-manager and 
ingress-nginx with the latest versions, ensuring better 
resource management and improved deployment consistency.

kind/namespaces.yaml

@@ -0,0 +1,14 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: external-secrets
+---
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: cert-manager
+---
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: ingress-nginx