Tidy up the examples repo + add a Helm hooks examples (#40)

apps/templates/namespaces.yaml

@@ -0,0 +1,27 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: helm-guestbook
+  annotations:
+    argocd.argoproj.io/sync-wave: "-1"
+---
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: helm-hooks
+  annotations:
+    argocd.argoproj.io/sync-wave: "-1"
+---
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: kustomize-guestbook
+  annotations:
+    argocd.argoproj.io/sync-wave: "-1"
+---
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: sync-waves
+  annotations:
+    argocd.argoproj.io/sync-wave: "-1"